| Christian Roa | P | 2018-2020 | Texas A&M |
| Andrew Roach | P | 2018-2020 | UNC Charlotte, Cowley College |
| Bobby Roach | P | 2012-2015 | Tennessee Tech, Gannon |
| Brendan Roach | C | 2018-2019 | Saint Joseph's |
| Chris Roach | P | 2008-2010 | Liberty, Chipola College, Seton Hall |
| David Roach | 1B | 2000-2003 | Minnesota |
| Derek Roach | P | 2004-2008 | Wichita State, Dallas Baptist |
| Dustin Roach | C-IF | 2002-2004 | Long Island-Brooklyn, Rutgers-Camden |
| Joe Roach | OF | 2005-2005 | Canisius College, Erie CC |
| Josh Roach | P | 2001-2002 | Western Illinois |
| Kendale Roach | IF | 2008-2008 | Tennessee Tech |
| Nathan Roach | C-P | 2019-2019 | Va Military Inst. |
| Tyler Roach | IF | 2013-2014 | East Tennessee State, Chattanooga State Technical CC |
| Brian Roades | IF | 2006-2006 | UC Irvine |
| Jerry Roam | SS | 2011-2014 | South Alabama, St. Louis CC-Meramec, Lindenwood University |
| Chris Roan | C | 2017-2020 | Rider, Rowan-Gloucester |
| Michael Roane | IF | 2001-2004 | UNC Charlotte, Western Carolina |
| Bart Roark | IF | 2008-2008 | East Tennessee State |
| Dillon Roark | P | 2010-2010 | Eastern Illinois, Joliet Junior College |
| Griffith Roark | IF | 2011-2013 | Western Kentucky, Cowley College |
| Jacob Roark | P | 2011-2012 | Northwestern State |
| Mark Roarty | IF | 2009-2009 | Saint Peter's |
| Mike RoBards | P | 2012-2014 | San Diego State |
| Ryan Robards | OF | 2017-2017 | Pacific |
| Justin Robarge | P | 2013-2016 | Hartford |
| Ryan Robb | IF | 2015-2018 | Air Force |
| Al Robbins | IF | 2013-2015 | South Dakota State, Illinois at Springfield |
| Brad Robbins | P | 2006-2006 | Western Carolina |
| Brady Robbins | P | 2005-2005 | Texas State |
| Chad Robbins | P | 2002-2002 | Cal State Fullerton |
| Champion Robbins | SS | 2020-2020 | Savannah State |
| Cole Robbins | IF | 2017-2018 | Saint Peter's |
| Dakota Robbins | C | 2015-2018 | Auburn, Miami-Dade College, Pensacola State College, Marshall, Seminole State College |
| Grant Robbins | OF | 2017-2020 | UNLV |
| Jacob Robbins | IF | 2006-2009 | Kennesaw State |
| John Robbins | P | 2003-2005 | Kennesaw State |
| Logan Robbins | P | 2016-2019 | Louisiana Tech |
| Mark Robbins | P | 2007-2007 | Fairleigh Dickinson |
| Matt Robbins | C | 2004-2007 | Georgia |
| Michael Robbins | P | 2008-2009 | Meridian CC, McNeese State, Mississippi |
| Tom Robbins | P | 2002-2004 | Texas State, Tyler Junior College |
| Willis Robbins | P | 2013-2016 | Columbia |
| Zane Robbins | P | 2020-2020 | Hartford |
| Kyle Robeniol | P | 2016-2020 | Oregon, Orange Coast College, Utah |
| Adam Roberson | OF | 2003-2004 | Arkansas State |
| Arney Roberson | C | 2008-2010 | Savannah State |
| Brady Roberson | IF | 2013-2014 | Florida, Santa Fe CC |
| Brandon Roberson | OF | 2003-2004 | Chicago State, Grambling State |
| Broadus Roberson | OF | 2019-2020 | UNC Wilmington |
| Craig Roberson | SS | 1980-1983 | Clemson |
| Jacen Roberson | OF | 2020-2020 | Cal State Bakersfield |
| Joey Roberson | 1B | 2017-2020 | Savannah State, Cleveland State CC |
| Kyle Roberson | OF | 2002-2005 | Winthrop |
| Lee Roberson | 1B-P | 2003-2004 | Florida |
| Mike Roberson | C | 2015-2017 | Ball State, Northern Illinois |
| Ryan Roberson | P | 2005-2006 | Miss. Valley St |
| Ryan Roberson | IF | 2010-2015 | North Florida |
| Sam Roberson | C | 2012-2016 | SE Louisiana |
| Troy Roberson | P | 1999-2002 | Miami |
| Tyrone Roberson | OF | 2003-2005 | Missouri |
| Marc Robert | C | 2006-2008 | Tulane |
| Matthieu Robert | C | 2013-2016 | George Washington |
| Joe Roberti | C | 2013-2016 | Hartford |
| Dave Roberto | P | 2012-2012 | Saint Louis |
| Aaron Roberts | OF | 2007-2010 | Southern Illinois |
| Adam Roberts | IF | 2005-2006 | Hawaii, Edmonds CC |
| Alan Roberts | OF | 2007-2007 | New Jersey Tech |
| Alec Roberts | OF | 2019-2019 | UNC Charlotte |
| Austin Roberts | IF | 2014-2015 | UC Riverside, Riverside CC |
| Ben Roberts | CF | 2006-2015 | Washington State |
| Blair Roberts | IF | 2009-2012 | Air Force |
| Blake Roberts | 1B-3B | 2009-2012 | Central Arkansas |
| Brad Roberts | IF | 2009-2010 | Florida Gulf Coast, Pasco-Hernando CC, Tampa |
| Brandon Roberts | P-IF | 2006-2009 | Charleston Southern |
| Brett Roberts | IF | 2006-2006 | Miami |
| Brett Roberts | IF | 2020-2020 | Tennessee Tech |
| Bryan Roberts | 2B | 2007-2008 | Northeastern, Binghamton |
| Bryan Roberts | P | 1989-2013 | Illinois |
| Caleb Roberts | P | 2015-2016 | Alabama A&M |
| Caleb Roberts | OF-C | 2019-2020 | North Carolina |
| Cam Roberts | P | 2019-2020 | Appalachian State |
| Chad Roberts | UT | 2015-2018 | Marshall, Sinclair CC, Northern Kentucky |
| Chris Roberts | H | 2007-2007 | Coppin State College |
| Chris Roberts | OF | 2007-2010 | Michigan State |
| Colby Roberts | OF | 2012-2013 | James Madison, Crowder |
| Cole Roberts | SS | 2020-2020 | Loyola Marymount |
| Conner Roberts | P | 2017-2020 | UC Santa Barbara, Santa Barbara City College |
| Corey Roberts | P | 2010-2014 | UNC Charlotte |
| Daniel Roberts | P | 2004-2007 | South Alabama, Chipola College, Louisiana-Monroe |
| Derek Roberts | P | 2006-2009 | Central Ct State |
| Desmond Roberts | OF | 2014-2014 | UNC Charlotte, Garden City CC |
| Devin Roberts | P | 2005-2005 | William and Mary |
| DJ Roberts | P | 2017-2017 | South Florida |
| Drew Roberts | IF | 2004-2007 | Xavier |
| Drew Roberts | OF-IF | 2005-2008 | Texas Tech, Oklahoma, Grayson County College |
| Drew Roberts | P | 1994-1995 | Kent State |
| Eric Roberts | P | 2003-2005 | Alabama-Birmingham, Georgia, Jefferson State CC |
| Eric Roberts | IF | 2019-2019 | Evansville |
| Eugene Roberts | OF | 2004-2004 | Alabama A&M |
| Evan Roberts | P | 2015-2018 | Davidson College |
| Garret Roberts | OF-P | 2020-2020 | Massachusetts-Lowell |
| Garrett Roberts | P | 2015-2015 | Columbia |
| Greg Roberts | IF | 2004-2005 | East Tennessee State, South Georgia College |
| Houston Roberts | C | 2015-2018 | UC Davis, Cabrillo College |
| Jack Roberts | P | 2015-2017 | Virginia |
| Jack Roberts | IF | 2018-2020 | Elon |
| Jae Roberts | OF | 2016-2016 | South Carolina, North Greenville |
| Joe Roberts | P | 2005-2007 | Toledo, Lansing CC |
| John Roberts | P | 2012-2014 | Florida A&M |
| Jon Roberts | H | 2004-2005 | Bethune-Cookman |
| Jon Roberts | OF | 2006-2009 | Harvard |
| Jonathan Roberts | P | 2011-2014 | Georgia Tech |
| Joshua Roberts | P | 2008-2010 | Alcorn State |
| Justin Roberts | P | 2002-2002 | Butler |
| Keith Roberts | IF-C | 2014-2017 | Longwood, Christopher Newport |
| Kenny Roberts | IF | 2012-2013 | Alabama, Meridian CC |
| Kevin Roberts | 2B | 2001-2004 | Siena College |
| Kevin Roberts | 3B-SS | 2011-2011 | Columbia |
| Kevin Roberts | OF | 2019-2019 | Rhode Island |
| Kyle Roberts | 2B | 2006-2010 | Columbia |
| Luke Roberts | P | 2008-2011 | Navy |
| Marcus Roberts | P | 2015-2015 | Florida A&M |
| Mark Roberts | P | 2011-2012 | Murray State |
| Matt Roberts | OF | 2003-2004 | UNC Asheville |
| Matt Roberts | OF | 2006-2009 | Akron |
| Matt Roberts | C | 2010-2013 | Air Force, North Carolina |
| Matt Roberts | C | 2016-2016 | Florida Gulf Coast |
| Michael Roberts | OF | 2004-2006 | Nicholls State |
| Michael Roberts | P | 2012-2016 | Coppin State College, Mesa State College |
| Mike Roberts | 3B-SS | 2006-2009 | Columbia |
| Mike Roberts | P | 2006-2008 | Maryland-Eastern Shore |
| Nate Roberts | IF | 2010-2013 | Seattle |
| Nick Roberts | C | 2001-2004 | Vermont |
| Nick Roberts | IF | 2017-2020 | Washington |
| Nolan Roberts | P | 2014-2014 | St. Bonaventure |
| Otto Roberts | P | 2009-2013 | Creighton, Southwestern Illinois College, Illinois State |
| Ryan Roberts | OF | 2006-2008 | Lafayette College |
| Shane Roberts | P | 2019-2020 | South Carolina, Appalachian State |
| Spencer Roberts | P | 2007-2010 | Oral Roberts, Chandler-Gilbert CC, UNLV |
| Taron Roberts | OF | 2004-2006 | Alcorn State |
| Tray Roberts | OF | 2014-2016 | Liberty |
| Tristan Roberts | P | 2017-2019 | Georgia Southern, Presbyterian College |
| Vincent Roberts | P | 2011-2012 | Cal State Northridge, Modesto Junior College |
| Alex Robertson | P | 2009-2009 | Appalachian State |
| Blake Robertson | 3B | 2020-2020 | Oklahoma State |
| Brent Robertson | IF | 1999-2002 | Washington, Washington State |
| Brian Robertson | P | 2020-2020 | Dayton |
| Chandler Robertson | OF | 2017-2019 | Central Florida, Murray State College |
| Cordarian Robertson | IF | 2010-2011 | Savannah State |
| Drew Robertson | P | 2015-2018 | Baylor, Tyler Junior College |
| Dylan Robertson | IF | 2016-2018 | St. Mary's (CA), San Joaquin Delta College, Pacific |
| Hank Robertson | P | 2008-2009 | Texas A&M, North Central Texas College |
| John Robertson | C | 2013-2013 | Indiana |
| Judd Robertson | OF | 2004-2005 | Western Kentucky, Marshalltown CC |
| Kylar Robertson | C | 2014-2017 | SE Missouri State, Eastern Oklahoma State College |
| Kyle Robertson | P | 2009-2009 | Morehead State |
| Mark Robertson | P | 2004-2004 | Radford |
| Matthew Robertson | P | 2009-2012 | Morehead State |
| Michael Robertson | OF | 2010-2012 | Liberty, Bellevue CC |
| Payton Robertson | IF | 2017-2020 | Lamar, LSU-Shreveport |
| Phillip Robertson | C | 2002-2002 | Eastern Kentucky |
| Robbie Robertson | C | 2002-2002 | George Mason, Pasco-Hernando CC |
| Russell Robertson | C | 2008-2010 | Western Carolina, Guilford College |
| Sam Robertson | P | 2009-2010 | Fairfield |
| Scott Robertson | P | 2002-2003 | Cal State Northridge, Oxnard College |
| Scott Robertson | P | 2000-2003 | Washington |
| Trae Robertson | P | 2019-2020 | Missouri |
| Tyler Robertson | IF | 2015-2018 | Western Kentucky, John A. Logan College |
| Andre Robichaux | OF | 2008-2008 | Louisiana-Lafayette |
| Tony Robie | P | 2020-2020 | Texas State |
| Marcus Robin | H | 2007-2008 | Coppin State College |
| Matt Robin | P | 2010-2011 | Ohio |
| Shea Robin | C | 2005-2008 | Vanderbilt |
| Kyle Robinett | C | 2013-2013 | Dayton |
| Lane Robinette | C | 2015-2018 | Columbia |
| Mark Robinette | P | 2010-2014 | Oklahoma State, Northeast Texas CC |
| Neil Robinette | IF | 2007-2010 | Wofford |
| Nick Robino | P | 2017-2020 | Wagner, Wilmington University |
| Eli Robins | P | 2008-2011 | Wake Forest |
| Josh Robins | P | 2018-2020 | Loyola Marymount |
| Justin Robins | H | 2011-2011 | Alabama State |
| Aaron Robinson | C | 2018-2018 | Norfolk State |
| Adam Robinson | OF | 2011-2012 | Michigan |
| AJ Robinson | OF | 2012-2013 | San Diego, Scottsdale CC |
| Alex Robinson | OF | 2009-2012 | Notre Dame |
| Andrew Robinson | C | 2007-2009 | Tulane |
| Andrew Robinson | OF | 2017-2020 | Western Carolina |
| Austin Robinson | P | 2014-2017 | Savannah State |
| Banks Robinson | IF | 1999-2002 | Mississippi |
| Blair Robinson | IF | 2002-2003 | Oklahoma, Dallas Baptist |
| Blake Robinson | P | 2017-2019 | College of Charleston, South Carolina-Sumter |
| Brad Robinson | P | 2007-2008 | Middle Tenn State, Cleveland State CC |
| Brett Robinson | IF | 2004-2008 | UNC Asheville, Elon |
| Brian Robinson | IF | 2008-2008 | Evansville |
| Brian Robinson | P | 2000-2003 | Vermont |
| Bryan Robinson | P | 2005-2007 | New Mexico State, Glendale CC CA |
| Caleb Robinson | IF | 2015-2018 | Western Carolina |
| Carter Robinson | P | 2018-2020 | Louisiana-Lafayette, Mesa CC |
| Charles Robinson | OF | 2017-2020 | Texas Southern, Wharton County Junior College |
| Chase Robinson | OF-P | 2017-2020 | Jacksonville State |
| Chris Robinson | P | 2017-2019 | SIU-Edwardsville, Maple Woods CC |
| Christian Robinson | CF | 2018-2020 | Stanford |
| Cooper Robinson | IF | 2016-2020 | Rhode Island, Connecticut-Avery Point |
| Dan Robinson | 1B | 2001-2004 | Evansville |
| Dan Robinson | IF | 2008-2008 | Butler |
| Dillon Robinson | 3B | 2011-2015 | Brigham Young |
| DJ Robinson | OF-1B | 2010-2011 | Fairleigh Dickinson, Louisburg College |
| Dominic Robinson | OF | 2002-2002 | Florida State |
| Dominic Robinson | P | 2017-2020 | Sam Houston State |
| Drew Robinson | OF | 2004-2004 | Mississippi |
| Drew Robinson | 3B | 2010-2011 | North Carolina Central |
| Dwight Robinson | H | 2010-2010 | Coppin State College |
| Dylan Robinson | OF | 2015-2018 | Massachusetts |
| Eric Robinson | IF | 2018-2018 | North Carolina Central |
| Griffin Robinson | OF | 2016-2019 | Saint Louis |
| Jared Robinson | P | 2014-2015 | Houston, Midland College |
| Jaron Robinson | IF-P | 2016-2019 | Murray State |
| Jarrad Robinson | P | 2001-2004 | Southern Miss, Tennessee-Martin |
| Jay Robinson | 2B | 2015-2018 | New Orleans |
| Jed Robinson | P | 2013-2016 | Connecticut, Trinity College |
| Jeff Robinson | P | 2006-2007 | Eastern Michigan |
| Joey Robinson | IF | 2003-2006 | Appalachian State |
| Jon Robinson | IF | 2002-2002 | Connecticut |
| Jonovan Robinson | P | 2004-2007 | Grambling State |
| Jordan Robinson | IF | 2014-2015 | Bethune-Cookman, Hutchinson CC |
| Justin Robinson | IF | 2017-2020 | Arkansas-Pine Bluff, CC of San Francisco |
| Kolby Robinson | IF | 2017-2020 | Alabama, Wallace State CC |
| Kross Robinson | P | 2017-2020 | UNC-Greensboro, Brevard College |
| Kurtis Robinson | UT | 2009-2009 | Lipscomb |
| Kyle Robinson | KF-OF | 2001-2003 | Illinois-Chicago |
| Larry Robinson | P | 2000-2002 | Morehead State |
| Lucas Robinson | P | 2003-2004 | Marist, Skyline College |
| Luke Robinson | OF | 2015-2018 | Lafayette College |
| Luke Robinson | C | 2017-2020 | Western Carolina |
| Mason Robinson | OF | 2015-2019 | Louisiana Tech, Wallace CC |
| Matt Robinson | C | 2003-2003 | Western Kentucky |
| Matt Robinson | IF | 2004-2004 | St. John's, Sacramento City College |
| Matt Robinson | OF | 2012-2012 | Dartmouth |
| Matt Robinson | P | 2014-2016 | Columbia |
| Mel Robinson | SS | 2002-2003 | Cal State Northridge, Fresno State |
| Mike Robinson | P | 2001-2001 | SE Missouri State, Chemeketa CC |
| Mike Robinson | P | 2008-2010 | South Dakota State |
| Nick Robinson | P | 2017-2020 | Rhode Island |
| Parks Robinson | P-OF | 2002-2002 | Georgia |
| Patrick Robinson | OF | 2016-2018 | Harvard |
| Payton Robinson | P | 2016-2019 | SE Louisiana |
| Quint Robinson | P | 2015-2018 | Tennessee, Cal State Northridge |
| Rayce Robinson | OF | 2006-2007 | Youngstown State |
| Reese Robinson | P | 2017-2019 | Cincinnati, Wake Forest |
| Robbie Robinson | OF | 2010-2011 | Valparaiso, Irvine Valley College |
| Robert Robinson | IF | 2019-2020 | Florida A&M |
| Ryan Robinson | P | 2008-2009 | Texas-Arlington, Howard College |
| Ryne Robinson | OF | 2004-2006 | Miami |
| Scott Robinson | P | 2002-2006 | Maine |
| Scott Robinson | P | 2010-2010 | Central Florida |
| Scott Robinson | P | 2013-2014 | UNC Asheville, Lake Sumter CC |
| Shaq Robinson | IF | 2016-2019 | Long Beach State, Sacramento City College, San Francisco State |
| Steve Robinson | C | 2014-2014 | Penn State |
| Tanner Robinson | IF | 2013-2015 | University at Buffalo, Ohlone College |
| Tarron Robinson | 1B | 2009-2012 | North Carolina, Brevard College |
| Teon Robinson | OF | 2005-2006 | Savannah State |
| Tyler Robinson | P | 2015-2018 | Northeastern |
| Tyler Robinson | P | 2015-2019 | Southern |
| Tyler Robinson | P | 2018-2018 | Savannah State |
| Wes Robinson | P | 2012-2013 | Middle Tenn State, Volunteer State CC |
| Will Robinson | P | 2010-2012 | Valparaiso, Fullerton College |
| Zach Robinson | IF | 2006-2007 | UC Irvine, Point Loma Nazarene |
| Zach Robinson | IF | 2010-2011 | Miami |
| Bryce Robison | P | 2020-2020 | Brigham Young |
| Curtis Robison | OF | 2018-2020 | Penn State |
| John Robison | OF | 2004-2007 | Oral Roberts |
| Stephen Robison | OF | 2004-2007 | Arkansas |
| Tyler Robison | P | 2019-2020 | Savannah State, Emmanuel College |
| Danny Robitaille | 2B | 2005-2005 | Miami |
| Dan Robl | P | 2006-2009 | Hofstra |
| Edward Robledo | IF | 2013-2016 | Prairie View A&M |
| Carlos Robles | OF | 2014-2016 | UNLV, Glendale CC CA |
| Fernando Robles | IF | 2007-2007 | Rhode Island |
| Juilo Robles | P | 2007-2009 | Texas Southern |
| Justin Robles | OF | 2019-2020 | Norfolk State, Charleston |
| Sergio Robles | OF | 2016-2019 | Cal State Bakersfield |
| Tyler Robles | IF | 2014-2018 | North Dakota, San Bernardino Valley College, Cal State San Bernardino |
| Jon Roblez | P | 2014-2017 | Kansas State, Alabama State, Johnson County CC |
| Jaron Roblyer | P | 2017-2020 | Houston Baptist, Wharton County Junior College |
| Austin Robson | P | 2012-2012 | Northwestern State, Angelina College |
| Taylor Robson | P | 2009-2009 | Michigan State |
| Brian Roby | OF | 2011-2011 | Santa Clara, De Anza |
| Mychal Roby | OF | 2007-2010 | Grambling State |
| Otis Roby | P | 2017-2018 | South Dakota State, Southeastern CC |
| Tony Roca | P | 2020-2020 | North Florida |
| Anthony Rocchietti | IF | 2016-2018 | Manhattan College |
| Joey Rocchietti | P | 2014-2017 | Manhattan College |
| Cayce Rocco | P | 2016-2018 | Cal State Northridge, Cuesta College |
| Joey Rocha | P | 2014-2014 | San Diego, Cypress College, Chandler-Gilbert CC |
| Matt Rocha | 2B | 2009-2009 | Texas A&M-Corpus Christi |
| Michael Rocha | P | 2008-2011 | Oklahoma |
| Devin Roche | C | 2019-2019 | Fairleigh Dickinson |
| DJ Roche | P | 2010-2014 | New Jersey Tech |
| Dusty Roche | P | 2004-2004 | Southern Utah, Salt Lake CC |
| Patrick Roche | OF-C | 2009-2010 | Northern Colorado, Northeastern Junior College |
| Steven Roche | P | 2010-2011 | High Point |
| Tim Roche | C | 2008-2008 | Northeastern |
| David Rochefort | P | 2007-2010 | Cornell |
| Joshua Rochelle | P | 2010-2011 | Southern |
| Zephan Rochelle | P | 2009-2013 | Nicholls State, Southern |
| Dylan Rock | OF | 2018-2020 | Texas-San Antonio |
| Joe Rock | OF | 2010-2013 | Manhattan College |
| Joe Rock | P | 2019-2019 | Ohio |
| Tyler Rockafellow | P | 2012-2012 | Dallas Baptist, Midland College, Trinity |
| Billy Rockefeller | UT | 2017-2019 | Sacramento State, Cosumnes River College, California Baptist |
| Jake Rockefeller | P | 2016-2020 | Rhode Island, Rhode Island College |
| Kumar Rocker | P | 2019-2020 | Vanderbilt |
| Mark Rockey | 1B-C | 2007-2008 | New Mexico, Puget Sound |
| Stephen Rockhill | OF | 2011-2011 | Southern Utah |
| Daniel Rockhold | C | 2009-2012 | South Florida |
| Tyler Rocklein | OF | 2010-2014 | Florida Atlantic, Manatee-Sarasota |
| Tanner Rockwell | P-IF | 2014-2015 | Ark-Little Rock, Arkansas Baptist College |
| Daniel Rod | IF | 2010-2013 | Xavier |
| Richard Rodarte | C | 2006-2006 | New Mexico |
| Darwin Rodas | P | 2019-2020 | New Jersey Tech, Barry |
| Vince Rodden | OF | 2005-2006 | New Mexico State, Johnson County CC |
| Robert Rodebaugh | C-1B | 2006-2007 | Elon, Presbyterian College |
| Brian Rodemoyer | IF | 2013-2016 | Illinois State |
| Alan Roden | C | 2020-2020 | Creighton |
| Andrew Roden | 1B-3B | 2019-2020 | Massachusetts-Lowell, Le Moyne |
| Liam Roden | P | 2017-2017 | Va Military Inst. |
| Mikel Rodenberg | P | 2008-2011 | High Point |
| David Roderick | P | 2019-2019 | Oklahoma |
| Andrew Rodgers | OF | 2006-2009 | Navarro College, Tulane, Alabama |
| David Rodgers | IF | 2016-2018 | Villanova |
| Domonique Rodgers | CF | 2008-2009 | Sacramento City College, NC State |
| Gray Rodgers | IF | 2018-2020 | Texas Christian, Blinn College |
| Greg Rodgers | IF | 2006-2008 | Saint Louis, St. Charles CC |
| Greg Rodgers | SS-3B | 2013-2016 | Niagara |
| Jamar Rodgers | P | 2001-2002 | Alcorn State |
| Jarrell Rodgers | P | 2011-2011 | Tennessee-Martin, St. Johns River CC |
| Jeff Rodgers | IF | 2001-2004 | Lafayette College |
| Jesse Rodgers | IF | 2004-2007 | Portland |
| Joey Rodgers | OF | 2005-2008 | Furman |
| Josh Rodgers | C-1B | 2006-2006 | Western Kentucky |
| Marcus Rodgers | H | 2006-2008 | Arkansas-Pine Bluff |
| Matt Rodgers | P-IF | 2014-2015 | Evansville, Lincoln Trail College |
| Payne Rodgers | SS-2B | 2020-2020 | Northwestern State |
| Bradley Rodier | 1B | 2016-2016 | Fairleigh Dickinson |
| Doug Rodio | IF | 2001-2002 | Penn State, George Mason |
| Teddy Rodliff | P | 2015-2018 | Stony Brook |
| Todd Rodman | H | 2004-2004 | Florida A&M |
| B.J. Rodrigue | IF | 2005-2008 | Saint Louis |
| Jacob Rodrigue | P | 2012-2013 | Nicholls State |
| Jamie Rodrigue | P | 2000-2003 | Nebraska |
| Dave Rodrigues | IF | 2000-2002 | Rhode Island |
| Joe Rodrigues | P | 2006-2007 | Western Illinois, Allen County CC |
| Thomas Rodrigues | SS-2B | 2011-2015 | Niagara |
| Aaron Rodriguez | P | 2003-2005 | Texas-San Antonio |
| Alberto Rodriguez | IF | 2011-2013 | Saint Peter's |
| Alex Rodriguez | IF | 2009-2009 | North Florida |
| Alex Rodriguez | IF | 2017-2019 | Kentucky, Northern Oklahoma College-Tonkawa Campus |
| Alex Rodriguez | IF | 2018-2020 | Northern Illinois |
| Ali Rodriguez | IF | 2010-2013 | New York Tech |
| Andre Rodriguez | OF | 2010-2010 | Missouri |
| Andre Rodriguez | P | 2011-2014 | Jackson State |
| Andres Rodriguez | OF | 2011-2012 | Bradley, Triton College |
| Andres Rodriguez | IF | 2012-2016 | USC, Biola |
| Andrew Rodriguez | OF | 2010-2012 | San Jose State |
| Andy Rodriguez | 3B | 2018-2020 | Incarnate Word, East Los Angeles College |
| Anthony Rodriguez | P | 2018-2018 | NC A&T State |
| Antonio Rodriguez | OF | 2013-2014 | Florida Intl |
| Austin Rodriguez | IF | 2015-2016 | Florida Intl, LA Mission |
| Ben Rodriguez | P | 2005-2009 | Northwestern State |
| Brady Rodriguez | P | 2010-2014 | Abilene Christian, Ball State |
| Brady Rodriguez | P | 2018-2020 | Sacramento State |
| Brett Rodriguez | IF | 2017-2020 | Wofford |
| Brian Rodriguez | IF-P | 2017-2020 | Northeastern |
| Carlos Rodriguez | C | 2006-2009 | Va. Commonwealth |
| Carlos Rodriguez | P | 2012-2012 | Oregon State |
| Chris Rodriguez | IF | 2007-2008 | Miami, Triton College |
| Chris Rodriguez | IF | 2017-2019 | USC-Upstate |
| Chris Rodriguez | P | 2017-2018 | Wright State, Kishwaukee College |
| Christian Rodriguez | UTIL | 2018-2019 | Incarnate Word |
| CJ Rodriguez | C | 2020-2020 | Missouri State |
| Corey Rodriguez | SCOUT | 1991-1991 | Cal State East Bay, South Alabama, De Anza |
| Cory Rodriguez | IF | 2002-2005 | Rutgers |
| Curtis Rodriguez | P | 2003-2003 | Brigham Young |
| Damian Rodriguez | OF | 2016-2017 | Marshall, Trinidad State Junior College |
| Dan Rodriguez | SS-OF | 2005-2005 | Iona College |
| Daniel Rodriguez | P | 2005-2005 | New Orleans |
| Danny Rodriguez | IF | 2013-2016 | Samford |
| Danny Rodriguez | P | 2014-2017 | Florida A&M, Pasco-Hernando CC |
| Danny Rodriguez | 1B | 2016-2019 | Bethune-Cookman |
| David Rodriguez | P | 2001-2004 | George Washington, Fordham |
| Diobel Rodriguez | C | 2017-2020 | Cornell, Mohawk Valley CC |
| Edwin Rodriguez | C | 2006-2007 | Butler |
| Erik Rodriguez | OF | 2017-2019 | Marshall, Clarendon College |
| Esteban Rodriguez | P | 2010-2011 | Arkansas-Pine Bluff |
| Eugene Rodriguez | C | 2003-2004 | Alabama-Birmingham, Shelton State CC |
| Felipe Rodriguez | C | 2016-2019 | Texas State |
| Freddy Rodriguez | IF | 2005-2006 | Oklahoma, Cypress College |
| Gabriel Rodriguez | P | 2016-2016 | Prairie View A&M |
| George Rodriguez | P | 2016-2019 | Fordham, Pace |
| Graham Rodriguez | P | 2010-2012 | San Jose State, Chabot College, Sonoma State |
| Grevin Rodriguez | P | 2003-2006 | Saint Peter's, Western Oregon |
| Hector Rodriguez | P | 2003-2003 | Texas-San Antonio |
| Hunter Rodriguez | P | 2013-2017 | Utah |
| James Rodriguez | C | 2011-2012 | Prairie View A&M, Laredo CC |
| Jason Rodriguez | OF | 2004-2006 | Louisiana-Lafayette, New Mexico State, Central Arizona College |
| Jefrey Rodriguez | C | 2020-2020 | Jackson State |
| Jeremy Rodriguez | P | 2019-2020 | Stephen F. Austin, Angelina College |
| Joe Joe Rodriguez | P | 2020-2020 | St. John's, Cumberland County College |
| Joey Rodriguez | OF | 2013-2016 | Wake Forest |
| Joey Rodriguez | P | 2020-2020 | Old Dominion |
| John Rodriguez | 3B | 2019-2019 | Florida Intl |
| Jonathan Rodriguez | IF-OF | 2009-2009 | New Mexico State |
| Jordan Rodriguez | P | 2014-2018 | Arkansas, Alvin CC, Texas-San Antonio |
| Jose Rodriguez | H | 2004-2004 | Texas A&M-Corpus Christi |
| Jose Rodriguez | IF | 2004-2005 | Texas State, Temple College |
| Jose Rodriguez | OF | 2010-2011 | College of Charleston, Broward College |
| Jose Rodriguez | OF | 2008-2008 | South Carolina |
| Josh Rodriguez | P | 2013-2013 | Cal State Bakersfield, Cabrillo College |
| Josh Rodriguez | OF | 2020-2020 | Rutgers |
| Joshua Rodriguez | H | 2007-2007 | Florida A&M |
| Jovan Rodriguez | OF | 2007-2007 | Sacred Heart |
| Juan Rodriguez | C | 2008-2008 | Texas Tech, Lassen CC |
| Justin Rodriguez | OF | 2020-2020 | NC A&T State |
| Kenny Rodriguez | OF | 2020-2020 | Ark-Little Rock |
| Kevin Rodriguez | P | 2010-2010 | Alabama A&M |
| Les Rodriguez | P | 2005-2005 | Florida Intl |
| Lionexis Rodriguez | C | 2018-2018 | Alabama A&M |
| Luis Rodriguez | C | 2020-2020 | Alabama State |
| Manny Rodriguez | C | 2012-2015 | Alabama State |
| Marcus Rodriguez | 3B | 2007-2010 | Samford |
| Martin Rodriguez | OF | 2020-2020 | Stephen F. Austin |
| Matt Rodriguez | H | 2004-2004 | Bethune-Cookman |
| Michael Rodriguez | P | 2020-2020 | UW Milwaukee |
| Mike Rodriguez | 3B-1B | 2019-2019 | New York Tech |
| Miko Rodriguez | OF | 2020-2020 | Texas A&M, USC |
| Nic Rodriguez | C | 2002-2003 | UC Santa Barbara, Cochise College |
| Nolan Rodriguez | P | 2020-2020 | Baylor |
| Octavio Rodriguez | P | 2014-2016 | Oklahoma, Navarro College, Auburn |
| Paul Rodriguez | P | 2008-2008 | Coastal Carolina |
| Pete Rodriguez | OF | 2006-2007 | Louisville, Saint Thomas |
| Phillip Rodriguez | P | 2004-2008 | Texas-Pan American |
| Ralph Rodriguez | P | 2007-2007 | Florida Intl |
| Raul Rodriguez | SS-2B | 2005-2005 | Texas-Pan American, Texas-Brownsville and Texas Southmost College |
| Raymond Rodriguez | P | 2011-2012 | Jackson State |
| Renan Rodriguez | P | 2013-2014 | Pittsburgh, Miami-Dade College |
| Rich Rodriguez | P-1B | 2019-2019 | James Madison |
| Richard Rodriguez | IF | 2014-2014 | Delaware State, Cincinnati |
| Robert Rodriguez | P | 2004-2006 | Northern Iowa |
| Roberto Rodriguez | C | 2013-2013 | Georgetown |
| Rudy Rodriguez | H | 2005-2005 | Savannah State |
| Ruy Rodriguez | C | 2008-2011 | Florida Intl, Saint Thomas, Texas-Pan American |
| Ryan Rodriguez | --- | 2004-2007 | Nevada |
| Ryan Rodriguez | P | 2018-2020 | UC Davis |
| Samuel Rodriguez | P | 2008-2009 | Bethune-Cookman |
| Sergio Rodriguez | P | 1996-2010 | Florida |
| Steven Rodriguez | P | 2004-2005 | Centenary College |
| Trevino Rodriguez | P-OF | 2015-2017 | Villanova |
| Trey Rodriguez | IF | 2013-2016 | Incarnate Word, Grayson County College |
| Victor Rodriguez | C | 2007-2008 | Florida Gulf Coast, Miami-Dade College |
| Will Rodriguez | 3B | 2007-2008 | Charleston Southern |
| Chris Rodriquez | IF-C | 2015-2015 | Coppin State College |
| Esteban Rodriquez | C | 2006-2006 | Charleston Southern |
| Gabriel Rodriquez | H | 2009-2009 | Florida A&M |
| James Rodriquez | P | 2002-2004 | Kentucky |
| Craig Rodwogin | IF | 2004-2007 | Columbia |
| Chris Roe | P | 2015-2016 | Tennessee-Martin |
| Shon Roe | IF | 2009-2012 | Loyola Marymount |
| Kevin Roebuck | OF | 2009-2011 | Lamar |
| Tommy Roebuck | P | 2010-2011 | Lamar, North Central Texas College |
| Eric Roeder | IF-OF | 2000-2003 | Northwestern |
| Michael Roeder | OF | 2007-2008 | Tennessee Tech, Kaskaskia College |
| Tucker Roeder | C | 2009-2012 | Northeastern |
| Cort Roedig | P | 2019-2020 | Georgia Tech |
| Mario Roefaro | P | 2005-2008 | University at Buffalo, Binghamton, Herkimer County CC |
| Brent Roehrich | P-1B | 2010-2013 | Duquesne, West Chester |
| Tristen Roehrich | P | 2020-2020 | North Dakota State, Iowa Western CC |
| Michael Roehrig | 1B-OF | 2012-2014 | Stony Brook |
| TJ Roemmich | OF-P | 2007-2010 | Creighton |
| Joe Roenker | P | 2003-2006 | William and Mary |
| Nic Roes | C | 2019-2020 | SIU-Edwardsville, Skagit Valley College |
| Bryce Roesch | OF-P | 2017-2020 | Arkansas-Pine Bluff, Clark College |
| Alex Roeser | OF-P | 2016-2016 | UC Davis |
| Jimmy Roesinger | IF | 2008-2011 | Dayton |
| Brett Roeske | OF | 2010-2010 | Binghamton |
| Nick Roets | IF | 2019-2020 | Maryland-Eastern Shore |
| Austin Roff | IF | 2009-2010 | Lamar, Seward County CC, CSU-Pueblo |
| Kaeber Rog | IF | 2019-2020 | Florida Intl |
| Jack Rogalla | P | 2011-2015 | Binghamton, Creighton |
| Rags Rogalla | P | 2015-2017 | Creighton |
| Tanner Rogen | P | 2017-2020 | Oral Roberts, Scottsdale CC |
| Alex Rogers | P | 2014-2017 | North Dakota State, Trinidad State Junior College |
| Billy Rogers | IF-C | 2010-2010 | Oakland |
| Bob Rogers | P | 2007-2010 | Hartford |
| Braden Rogers | IF | 2017-2019 | Nebraska at Omaha, Northern Oklahoma College-Enid Campus |
| Brent Rogers | IF | 2003-2006 | Delaware |
| Brett Rogers | P | 2003-2006 | Maine, Southern Maine |
| Brett Rogers | P | 2009-2013 | Stephen F. Austin, Texas of the Permian Basin |
| Casey Rogers | P | 2005-2007 | Kennesaw State, Truett-McConnell College |
| Chad Rogers | P | 2001-2002 | Southern Miss |
| Chaney Rogers | OF-1B | 2018-2020 | Georgia |
| Chris Rogers | 1B-OF | 2014-2017 | Western Kentucky, Lower Columbia CC |
| Dalton Rogers | P | 2020-2020 | SE Louisiana |
| Don Rogers | 3B | 2001-2003 | Wichita State, Saint Louis |
| Drew Rogers | C | 2005-2007 | Arkansas State |
| Gage Rogers | IF-P | 2015-2018 | High Point, Indiana U. Southeast |
| Garret Rogers | P | 2017-2019 | Morehead State, Barton County CC |
| Grant Rogers | IF | 2006-2006 | North Florida |
| Hayden Rogers | P | 2014-2018 | Brigham Young |
| Jack Rogers | P-OF | 2018-2020 | Sam Houston State |
| Jacob Rogers | H | 2008-2008 | Alabama A&M |
| Jacob Rogers | 3B | 2018-2020 | UNLV, Brigham Young |
| Jake Rogers | P | 2017-2019 | Georgia State, Cleveland State CC |
| Jared Rogers | P | 2010-2013 | Hofstra |
| Jason Rogers | P | 2002-2005 | Delaware |
| Jeremy Rogers | C | 2002-2004 | Kansas State, Alabama, Seminole Florida, Central Oklahoma |
| Jordan Rogers | P | 2008-2009 | Rice, San Jacinto |
| Jordon Rogers | C | 2020-2020 | Michigan |
| Josh Rogers | P | 2011-2012 | Southern Miss |
| Justin Rogers | OF-1B | 2005-2008 | Ball State |
| Kade Rogers | OF | 2002-2004 | Nicholls State |
| Kellen Rogers | IF | 2019-2020 | Prairie View A&M |
| Mason Rogers | C-OF | 2016-2018 | Troy, Lurleen B. Wallace CC |
| Matt Rogers | P | 2005-2006 | New Orleans, Delgado CC |
| Matt Rogers | P | 2006-2009 | Harvard |
| Michael Rogers | IF | 2007-2010 | Seton Hall |
| Mike Rogers | P | 2007-2008 | Ark-Little Rock, Lincoln Trail College |
| Mitch Rogers | P | 2019-2019 | Western Carolina |
| Mitchell Rogers | IF | 2015-2018 | McNeese State, Johnson County CC |
| Nick Rogers | P | 2000-2002 | Memphis |
| Nick Rogers | P | 2018-2020 | Bethune-Cookman, Glendale CC AZ, New Mexico State |
| Nolan Rogers | IF | 2014-2018 | Vanderbilt, Indiana U. Southeast |
| Pat Rogers | IF | 2005-2007 | Wagner |
| Patrick Rogers | P | 2004-2007 | Hofstra |
| Ridge Rogers | OF | 2018-2020 | Incarnate Word |
| Ross Rogers | P | 2017-2018 | Central Arkansas |
| Sam Rogers | P | 2014-2017 | USC-Upstate, Cecil College |
| Spencer Rogers | OF | 2011-2011 | Washington |
| Trevor Rogers | IF | 2009-2012 | Missouri State, Southern Arkansas |
| Tristan Rogers | IF | 2010-2010 | Nicholls State |
| Tucker Rogers | P | 2020-2020 | East Tennessee State, Louisburg College |
| Weston Rogers | P | 2016-2018 | Arkansas |
| Zac Rogers | P | 2015-2017 | Alabama |
| Bryce Rogers-Black | IF | 2018-2018 | Radford, Millersville Pennsylvania |
| Jamie Roggenkamp | P | 2002-2005 | New York Tech |
| Cody Rogina | P | 2013-2015 | UC Riverside |
| J.T. Rogoszewski | P | 2016-2020 | North Carolina, Central Michigan |
| Nick Rogowski | P-OF | 2011-2015 | Cal State Bakersfield, Cypress College, Moorpark College, Catholic America |
| Tyler Rogstad | P | 2009-2011 | Nevada, Edmonds CC |
| Anthony Rohan | OF | 2015-2017 | Youngstown State |
| Casey Rohan | P | 2003-2004 | Indiana U.-Purdue U.-FW, St. Louis CC-Forest Park |
| Gerrad Rohan | IF | 2012-2016 | Akron, Youngstown State |
| Tucker Rohde | IF | 2017-2020 | North Dakota State |
| Robert Roher | P | 2011-2012 | New Mexico State, Navarro College |
| Christian Rohlfing | OF | 2008-2010 | SIU-Edwardsville |
| Nick Rohlfs | C | 2008-2011 | Cincinnati |
| Jaime Rohlmeier | 2B | 2007-2008 | Sam Houston State |
| Blake Rohm | P | 2018-2019 | Virginia, Butler CC |
| Eric Rohr | P | 2003-2007 | Saint Louis |
| Spencer Rohr | OF | 2012-2013 | Dayton |
| Pat Rohrbaugh | OF | 2005-2006 | Toledo |
| Craig Rohren | IF-P | 2005-2006 | Dayton, Kankakee CC |
| Brandon Rohrer | OF | 2018-2020 | Liberty |
| Cal Rohrman | P | 2013-2015 | Dayton, Madison Area Technical College |
| Igor Roiberg | P | 2001-2004 | Western Kentucky |
| Xander Rojahn | P | 2020-2020 | Xavier |
| Eric Rojas | P | 2017-2020 | Princeton |
| Freddy Rojas | UT | 2018-2020 | Texas-Pan American, Monroe CC, Hillsborough CC |
| Jose Rojas | C | 2005-2006 | Virginia Tech |
| Leo Rojas | IF | 2012-2013 | Alabama State, St. Petersburg College |
| Louis Rojas | 1B | 2004-2007 | Florida State, Samford |
| Mike Rojas | C | 2016-2019 | Chipola College, Auburn, Nova Southeastern |
| Rey Rojas | 2B | 2003-2004 | High Point |
| Santiago Rojas | C | 2016-2016 | Prairie View A&M |
| Cory Rojeck | OF-P | 2003-2005 | Cleveland State |
| Brian Rojee | IF | 2001-2004 | Sacred Heart |
| Kevin Rojko | OF | 2013-2014 | Villanova, Cabrillo College |
| Blake Roland | P | 2013-2013 | Charleston Southern |
| Dan Roland | C | 2012-2014 | St. John's |
| Dean Roland | P | 2011-2014 | UNC Asheville |
| Justin Roland | 2B | 2007-2008 | Stephen F. Austin, Texas Christian |
| Justin Roland | IF | 2009-2013 | UNC Charlotte |
| Case Rolen | P | 2015-2019 | Grayson County College, Abilene Christian, Tarleton State |
| Clay Rolf | 1B | 2012-2012 | Bowling Green State |
| Tony Rolfes | P | 2001-2002 | UNC Charlotte |
| Kevin Roliard | P | 2017-2020 | Texas, Alvin CC, McNeese State |
| Nate Rolka | P | 2020-2020 | Delaware |
| Tyler Rolland | OF | 2012-2015 | Southern Illinois, Cowley College |
| AJ Rolle | P | 2016-2020 | Georgia State, Allen County CC, Northwest Florida State College, Bryan College |
| Don Rolleg | OF | 2001-2002 | Air Force |
| David Rollen | C | 1990-1991 | Panola College, Texas A&M |
| Chase Rollin | OF-IF | 2018-2020 | Central Michigan |
| Danny Rollin | OF | 1977-1977 | Auburn |
| Seth Rollin | IF | 2002-2005 | Alabama-Birmingham |
| Ty Rollin | OF | 2017-2019 | Central Michigan |
| Tyler Rollin | 2B-SS | 2007-2007 | Alabama-Birmingham, Gadsden State CC |
| Eric Rollins | P | 2002-2005 | Kansas State |
| J.J. Rollins | C | 2005-2005 | Appalachian State |
| Kent Rollins | SS | 2013-2016 | Middle Georgia, Georgia Southern |
| Lucas Rollins | P | 2016-2020 | Saint Joseph's |
| Ty Rollinson | UT | 2004-2007 | Louisiana-Monroe |
| Reid Rollison | H | 2007-2009 | Western Carolina |
| Jakob Rolly | 1B | 2017-2020 | Rollins, Belmont Abbey College |
| Lance Rolston | OF | 2000-2002 | Ohio State |
| Jeff Roma | C | 2000-2003 | Temple, UNC Wilmington |
| Elian Roman | 2B-3B | 2020-2020 | Bethune-Cookman |
| Joel Roman | 3B | 2013-2016 | Fairleigh Dickinson |
| RJ Roman | IF | 2013-2014 | Northeastern |
| Eric Romanchuk | P | 2007-2008 | Sacred Heart |
| Tony Romanelli | P | 2016-2019 | Marist |
| Tyler Romanik | C | 2017-2018 | Eastern Kentucky, Manatee-Sarasota |
| Bobby Romano | SS | 2015-2019 | Fairleigh Dickinson |
| Connor Romano | P | 2017-2020 | Rhode Island |
| Dan Romano | C | 2003-2003 | Marist |
| Frankie Romano | C-P | 2014-2015 | Stetson |
| Gabriel Romano | P | 2019-2020 | Quinnipiac |
| Jake Romano | OF | 2013-2016 | Miami |
| Joe Romano | P-1B | 2006-2008 | St. Francis (NY), Saint Peter's |
| John Romano | C | 2006-2007 | Central Ct State, Brookdale CC |
| Nick Romano | 1B | 2018-2020 | Central Florida, St. Johns River CC |
| Chris Romanow | 1B-3B | 2004-2007 | George Mason |
| Will Romanowicz | P | 2005-2007 | Stetson, Elon |
| Nate Romans | IF | 2017-2019 | Ohio State |
| Nate Rombach | C | 2020-2020 | Texas Tech |
| Nick Rome | C | 2010-2014 | Louisiana-Monroe, Coastal Alabama-Monroeville, Lipscomb |
| Collin Romel | P | 2018-2020 | Kent State |
| Michael Romeo | 3B | 2006-2006 | Lynn |
| Phillip Romeo | P | 2019-2020 | Fairleigh Dickinson |
| Chad Romere | P | 2017-2019 | Texas A&M-Corpus Christi |
| Boston Romero | IF | 2015-2019 | Cal State Fullerton, Sacramento City College, William Penn University |
| Brandon Romero | P | 2007-2010 | Southern Utah |
| Brandon Romero | IF | 2014-2017 | Marshall |
| Brian Romero | IF | 2013-2015 | Indiana State, Saddleback College |
| Joe Romero | P | 2014-2017 | SUNY - Albany |
| Jordan Romero | C | 2014-2017 | LSU, LSU-Eunice |
| Josh Romero | C | 2002-2003 | Cincinnati, Indiana |
| Julian Romero | IF | 2003-2005 | Northwestern |
| Kevin Romero | P | 2016-2018 | Rutgers |
| Larry Romero | P | 2013-2016 | Texas Southern |
| Marcus Romero | OF | 2009-2012 | Southern Utah |
| Panch Romero | IF | 2001-2004 | Santa Clara |
| Victor Romero | C | 2012-2013 | Oklahoma State, Solano CC (CA) |
| Michael Romett | IF | 2007-2007 | Mount Saint Mary, Christopher Newport |
| Ryne Romick | P | 2006-2009 | Akron |
| Clay Rominger | P | 2008-2008 | Ark-Little Rock, Indian Hills CC-Centerville |
| Anthony Romito | P | 2013-2015 | Fairleigh Dickinson, College of Saint Rose |
| Klint Rommel | P | 2000-2002 | Austin Peay |
| Jacob Romney | OF | 2006-2008 | Southern Utah, Eastern Arizona College |
| Beto Romo | P | 2004-2006 | Oklahoma State, Midland College, New Mexico State |
| Bryant Romo | P | 1999-2002 | Brown |
| Ryan Romo | OF | 2014-2015 | Baylor, Howard College |
| Seve Romo | IF-P | 2014-2018 | San Diego, East Los Angeles College, Arizona |
| Brian Ronai | IF-P | 2017-2020 | Yale |
| Caolan Ronan | IF-P | 2008-2012 | La Salle |
| John Ronan | P | 2005-2006 | New York Tech |
| Mason Ronan | P | 2019-2020 | Pittsburgh |
| Anthony Rondon | IF | 2016-2018 | Manhattan College, Barry |
| Ferdinand Rondon | C | 2014-2014 | Florida A&M, Lincoln College |
| Luke Roniger | P | 2005-2008 | San Diego |
| Gene Ronkiewicz | IF | 2004-2005 | Wagner |
| Alex Ronnebaum | IF | 2018-2020 | Arkansas, Howard College, Kent State |
| Jake Rons | P | 2020-2020 | Long Beach State |
| Chad Rood | P | 2012-2013 | Stetson, FSC at jacksonville |
| Mark Rood | C | 2007-2008 | Stetson, Lake Sumter CC |
| Cameron Roof | IF | 2019-2020 | Winthrop |
| Derek Roof | P | 2010-2010 | Indiana, Union U |
| Michael Roof | SS | 2000-2002 | Tennessee-Martin |
| Jeff Rook | OF | 2000-2000 | Ohio |
| Thomas Rooke | P | 2008-2010 | Kansas State |
| Josh Rooker | C | 2018-2019 | Memphis, Shelton State CC |
| Ron Rooker | P | 1984-1985 | San Jose State |
| Scott Rooker | OF | 2003-2006 | Oklahoma |
| Barry Rooks | P | 2009-2010 | Florida Atlantic, Daytona Beach CC |
| Jason Rooks | OF | 2018-2020 | Chattahoochee Val, Virginia Tech |
| Bobby Rooney | 1B-P | 2002-2002 | Illinois State |
| Colin Rooney | SS | 2009-2010 | Saddleback College, Pepperdine |
| Edward Rooney | OF | 2011-2011 | Bryant University |
| Joe Rooney | H | 2001-2003 | Western Illinois |
| John Rooney | OF | 2011-2014 | Siena College |
| Kelly Rooney | IF | 2012-2015 | Massachusetts-Lowell |
| Mike Rooney | P | 1988-1988 | Cal State Northridge |
| Patt Rooney | IF | 2002-2005 | Pepperdine |
| Reid Rooney | P-IF | 2009-2012 | Central Michigan |
| Dillon Roop | C | 2019-2020 | Alabama A&M |
| Austin Root | P | 2015-2018 | Sacramento State |
| Bayden Root | P | 2019-2020 | Ohio State |
| Derek Root | OF | 2001-2003 | Vermont |
| J.T. Root | P | 2013-2013 | James Madison |
| Mackie Root | OF | 2002-2004 | Hofstra |
| Mike Root | P | 2005-2005 | New York Tech, St. Lawrence |
| Cody Roper | P | 2013-2016 | UNLV |
| Dax Roper | C | 2017-2020 | Coastal Carolina, Florence-Darlington Tech, Furman, Creighton |
| Jake Roper | OF | 2019-2020 | Maine, Palm Beach State College |
| Jordan Roper | IF | 2018-2018 | Marist, Northern Essex CC |
| Reid Roper | SS | 2012-2015 | Illinois |
| Ryne Roper | SS-P | 2014-2017 | Illinois, Union U |
| Todd Roper | 2B | 2001-2004 | Western Carolina |
| John Ropp | P | 2007-2007 | McNeese State |
| Chris Roppolo | OF | 2016-2016 | UC Davis |
| Ashley Roque | P | 2001-2005 | Jacksonville, CCBC-Dundalk, UMD-Baltimore Cty |
| Tony Roque | IF | 2013-2016 | Texas-Pan American, Western Nevada CC, Chico State |
| Matt Roquemore | OF | 2006-2010 | Hawaii |
| Walter Roquemore | OF | 2005-2008 | Grambling State |
| Clint Roques | OF | 2007-2010 | Kennesaw State |
| Darien Rorabeck | P | 2019-2020 | Presbyterian College, Indian River CC |
| Jordan Rorex | OF-IF | 2010-2013 | Middle Tenn State |
| Brian Rorick | P | 2006-2010 | Delaware, Coastal Carolina |
| James Rorie | C | 2018-2019 | NC A&T State |
| Gavin Rork | OF | 2019-2020 | Seattle |
| Andrew Rosa | SS | 2014-2018 | Oklahoma State |
| Anthony Rosa | OF | 2011-2011 | Nevada |
| Gaby Rosa | P-2B | 2014-2017 | Rutgers |
| Ryan Rosa | IF | 2014-2014 | Cal Poly |
| Jandy Rosabal | IF | 2009-2010 | Florida |
| Vinnie Rosace | P | 2014-2015 | Central Florida, Seminole Florida |
| Alex Rosachi | P | 2005-2007 | Sacred Heart |
| Francisco Rosado | C | 2009-2009 | Coppin State College |
| Steven Rosado | OF | 2009-2010 | Troy, North Florida CC |
| Tony Rosado | P-C | 2010-2010 | Loyola Marymount |
| Dan Rosaia | C | 2005-2007 | Wake Forest, College of San Mateo |
| George Rosales | C | 2019-2020 | Fairleigh Dickinson |
| Javier Rosales | OF | 2018-2020 | Long Beach State, Orange Coast College |
| Marcos Rosales | IF | 2007-2008 | New Mexico State, Chandler-Gilbert CC |
| Jake Rosander | IF | 2016-2018 | Brown |
| Angel Rosario | OF | 2013-2016 | Norfolk State, Monroe CC |
| Jamell Rosario | OF | 2001-2003 | Rutgers |
| Joel Rosario | IF | 2015-2016 | Texas Southern |
| Luis Rosario | SS | 2008-2008 | Fairleigh Dickinson |
| Pablo Rosario | OF | 2007-2010 | High Point |
| Emilio Rosas | IF | 2019-2020 | USC |
| Joey Rosas | P | 2008-2009 | Yavapai College, Tennessee |
| Anthony Rosati | P | 2013-2017 | St. John's, Western Oklahoma State College, West Alabama, Oklahoma City |
| Christian Rosati | P | 2017-2018 | Massachusetts |
| Joe Rosati | OF | 2006-2009 | Villanova |
| Drew Rosbottom | 1B-OF | 2013-2014 | Purdue, Vincennes |
| Allen Rose | OF-1B | 2006-2007 | Jacksonville State, Jefferson State CC |
| Bryan Rose | OF | 2008-2011 | Kentucky, Northern Kentucky |
| Cameron Rose | P | 2013-2014 | Alabama-Birmingham, Jones County Junior College |
| Chandler Rose | SS | 2001-2005 | New Orleans, Central Florida |
| Christian Rose | P | 2017-2018 | Maryland-Eastern Shore, Hagerstown CC |
| CJ Rose | P-IF | 2011-2013 | Creighton, Saint Louis, Jefferson College |
| Daniel Rose | IF | 2007-2007 | St. John's |
| Doug Rose | IF | 2004-2005 | Davidson College |
| Eric Rose | OF | 2004-2007 | Michigan |
| Eric Rose | P | 2009-2009 | Nebraska |
| Jack Rose | P | 2013-2014 | Dayton |
| Jack Rose | P | 2018-2020 | Hartford |
| Jamie Rose | OF-IF | 2005-2006 | Le Moyne, SUNY-Brockport |
| Jason Rose | OF | 2004-2006 | Charleston Southern |
| Jimmy Rose | P | 2003-2003 | Kentucky |
| Josh Rose | OF | 2014-2017 | Utah |
| Lynnard Rose | OF | 2017-2017 | Columbia |
| Michael Rose | OF | 1999-1999 | Purdue |
| Mike Rose | OF | 2001-2004 | Air Force |
| Nathan Rose | IF | 2020-2020 | Bowling Green State |
| Scott Rose | C | 2001-2002 | East Tennessee State, Chattanooga State Technical CC |
| Ty Roseberry | 1B | 2017-2020 | Nebraska, Nebraska-Kearney |
| Josh Rosecrans | UT | 2009-2012 | Wichita State, Alabama, Georgia Perimeter College |
| Ernie Roselle | --- | 2003-2004 | Elon |
| Matt Rosemeyer | OF | 1994-1994 | UNLV |
| Alex Rosen | IF | 2019-2020 | Georgetown |
| Jake Rosen | IF | 2017-2020 | Virginia Tech, Northeastern |
| Jason Rosen | OF | 2014-2017 | Portland |
| Jeremy Rosen | P | 2004-2006 | La Salle |
| Mike Rosen | OF | 2003-2005 | Butler |
| Kurt Rosenacker | C | 2002-2005 | Oakland, Butler |
| Adam Rosenberg | OF | 2001-2004 | Lafayette College |
| Blaine Rosenberg | C | 2009-2010 | Furman, Montevallo |
| Jack Rosenberg | OF | 2016-2019 | Oral Roberts, Moorpark College |
| Seth Rosenberg | P | 2016-2017 | Northern Kentucky, Iowa |
| Trevor Rosenberg | P | 2007-2008 | George Mason, Kutztown |
| Trevor Rosenberg | IF | 2017-2020 | San Diego, UNLV |
| David Rosenberger | P | 2013-2016 | Virginia |
| Marshal Rosenberger | P | 2011-2013 | North Florida |
| Brett Rosenblum | OF | 2008-2011 | Central Ct State |
| Phil Rosenblum | 1B | 2012-2012 | Villanova, Wesleyan University |
| Sam Rosener | P | 2005-2008 | Air Force, SE Missouri State |
| Kyle Rosenfeld | P | 2019-2019 | Western Illinois |
| Mike Rosenfeld | C | 2011-2015 | Duke |
| James Rosenhagen | IF-OF | 2019-2019 | Chicago State |
| Hayden Rosenkrantz | P | 2018-2020 | Washington State |
| Jacob Rosenkranz | P | 2020-2020 | Valparaiso |
| Jamie Rosenkranz | IF | 2009-2012 | Monmouth |
| Brett Rosenthal | P | 2004-2007 | Yale |
| Travis Rosenwinkel | C-OF | 2013-2013 | Niagara, Corning CC |
| Jonathan Rosero | P | 2016-2019 | Villanova |
| Frank Rosetti | P | 2015-2016 | Lehigh |
| Caden Rosholt | IF | 2016-2018 | Texas-Pan American, Ranger College, New Orleans |
| DJ Roshone | P | 2005-2006 | Missouri State, Iowa Western CC |
| Daniel Rosica | C | 2016-2018 | UCLA |
| Malik Rosier | OF | 2015-2015 | Miami |
| John Rosinski | OF | 2008-2010 | Illinois-Chicago |
| Matt Rosinski | P | 2009-2012 | Miami |
| Ted Rosinski | OF | 2003-2006 | Illinois-Chicago |
| Trent Rosipal | P | 2015-2016 | Texas-San Antonio |
| Luke Roskam | UT | 2017-2020 | Nebraska |
| Chad Roskelly | C-IF | 2015-2018 | Michigan State |
| Michael Roskopf | 1B | 2007-2008 | Southern Nevada, USC, NC State, Yavapai College |
| Mack Rosman | IF | 2016-2016 | Northwestern |
| Daniel Rosoff | OF | 2009-2010 | Brown |
| Wade Rosolowski | OF | 2004-2005 | Canisius College, St. Bonaventure |
| Addison Rospert | IF-OF | 2014-2017 | Bowling Green State |
| Alex Ross | P | 2010-2011 | Lipscomb, Maple Woods CC, Bellevue CC |
| Austin Ross | P | 2020-2020 | Georgia State |
| Blake Ross | P-OF | 2011-2014 | College of Charleston |
| Brad Ross | C | 2004-2004 | UNLV, Spokane Falls CC, North Idaho College |
| Brandon Ross | P | 2018-2020 | San Jose State, Riverside CC, Hawaii |
| Caleb Ross | P | 2012-2016 | West Virginia, Marshall |
| Cameron Ross | OF | 2016-2019 | Cincinnati, Northern Kentucky |
| Chris Ross | P | 2012-2014 | Tennessee-Martin, Broward College |
| Daniel Ross | IF | 2009-2012 | North Dakota |
| Dusty Ross | P | 2011-2012 | Missouri, Vernon College |
| Dylan Ross | P | 2020-2020 | Eastern Kentucky |
| Erik Ross | OF | 2010-2012 | Oklahoma, Grayson County College |
| Ethan Ross | P | 2020-2020 | Washington State |
| Hayden Ross | IF | 2013-2015 | Baylor |
| Hunter Ross | P | 2013-2014 | Savannah State, South Georgia College |
| Ian Ross | OF | 2015-2017 | UW Milwaukee, Iowa Central CC |
| J.T. Ross | P | 2008-2011 | Northeastern, Kansas |
| Jack Ross | OF | 2014-2016 | Pepperdine |
| Jake Ross | OF | 2005-2006 | Pacific, Lower Columbia CC |
| Jake Ross | C | 2013-2014 | Youngstown State, Tacoma CC |
| Jason Ross | OF | 2002-2002 | South Carolina |
| Jesse Ross | IF | 2004-2006 | Radford, Old Dominion |
| Joe Ross | P | 2013-2014 | Chicago State, McHenry County College |
| Jordan Ross | IF | 2017-2019 | SIU-Edwardsville, Spokane Falls CC |
| Josh Ross | P | 1967-2009 | Memphis, Northwest Mississippi CC |
| Keith Ross | P | 2001-2004 | Rhode Island |
| Kevin Ross | P | 2013-2017 | Towson |
| Marcus Ross | IF | 2004-2005 | Western Kentucky, Midland College |
| Matt Ross | IF | 2016-2016 | Michigan |
| Mike Ross | OF | 2000-2002 | Maine |
| Nathan Ross | P | 2011-2014 | Arkansas-Pine Bluff, New Mexico |
| Octavius Ross | H | 2004-2004 | Grambling State |
| Ryan Ross | P | 2015-2018 | Appalachian State, St. Johns River CC, East Carolina |
| Ryan Ross | IF-OF | 2020-2020 | Cornell |
| Sean Ross | OF | 2018-2020 | San Diego State, Indiana State, Pensacola State College |
| Sidney Ross | P | 2018-2019 | Jackson State |
| Steve Ross | P | 2005-2009 | Kent State |
| Steven Ross | OF | 2011-2011 | Marshall, Maple Woods CC |
| Tayler Ross | P | 2014-2017 | Missouri State, Central Missouri |
| Teldrick Ross | OF | 2019-2019 | Middle Tenn State |
| Tell Ross | IF | 2009-2010 | Centenary College, Lon Morris College |
| Trey Ross | P | 2011-2012 | New Mexico State, San Jacinto |
| Tyler Ross | IF-OF | 2020-2020 | Bowling Green State |
| Zach Ross | OF | 2011-2011 | Ohio |
| Ernie Rosseau | OF | 1972-1973 | South Alabama |
| Carlos Rossel | P | 2012-2013 | Texas Southern |
| Chris Rosselot | P | 2002-2003 | Northern Iowa, Kirkwood CC |
| Neil Rosser | C | 2005-2008 | NC A&T State |
| Nick Rossetta | IF | 2011-2014 | San Jose State, Cabrillo College, Long Beach State |
| Nick Rossetti | IF | 2009-2011 | Iona College |
| Anthony Rossi | P | 2006-2008 | Pittsburgh |
| Frank Rossi | OF | 2004-2005 | Vermont |
| Harrison Rossi | OF | 2020-2020 | Chicago State |
| Joe Rossi | OF | 2015-2016 | Illinois-Chicago |
| Ricky Rossman | OF | 2008-2009 | Cal Poly |
| Santino Rosso | IF | 2020-2020 | Hofstra |
| Patrick Rossomando | H | 2010-2010 | Quinnipiac |
| Ronnie Rossomando | P | 2016-2019 | Connecticut, Southern Connecticut State |
| Kevin Rostenkowski | P | 1977-1977 | Miami |
| Nico Rosthenhausler | OF | 2010-2011 | Oklahoma State, South Mountain CC |
| Ryan Rosthenhausler | IF | 2011-2014 | Long Island-Brooklyn, Gateway CC, Southern Illinois |
| Justin Roszkowski | P | 2004-2006 | Rider |
| Fran Rotella | IF-OF | 2003-2005 | Monmouth |
| Austin Roth | P | 2019-2020 | Stephen F. Austin |
| CJ Roth | 2B | 2013-2016 | Longwood |
| Doug Roth | P | 2008-2011 | Texas-Pan American, Xavier |
| Jason Roth | OF | 2004-2004 | Indiana U.-Purdue U.-FW, Judson |
| Jason Roth | 1B-P | 2010-2012 | Northeastern |
| Jeff Roth | P-IF | 2008-2009 | Sacramento State, Golden West College |
| Jesse Roth | P | 2015-2015 | Pennsylvania, Miami |
| Justin Roth | C | 2006-2007 | Harvard |
| Kyle Roth | OF | 2008-2008 | McNeese State, Delgado CC |
| Matt Roth | IF | 2016-2019 | Radford |
| Nick Roth | P | 2018-2020 | San Francisco, College of Marin |
| Norm Roth | OF | 2004-2007 | Holy Cross |
| Todd Roth | P | 2007-2010 | Pennsylvania |
| Matt Rothenberg | IF | 2015-2018 | Harvard |
| Michael Rothenberg | C | 2018-2020 | Duke |
| Casey Rother | C | 2019-2020 | Lehigh |
| Kevin Rotherham | IF | 2008-2008 | Butler |
| Ryan Rothford | C | 2002-2003 | Fresno State, Fresno City College, Missouri |
| Phil Rothkugel | IF | 2002-2004 | Central Ct State |
| Chad Rothlin | P | 2009-2012 | UNC Charlotte |
| Trent Rothlin | P | 2008-2011 | Clemson, Mississippi, Walters State CC |
| Michael Rothmund | 1B | 2016-2018 | Illinois at Springfield |
| Brooks Rothschild | P | 2009-2012 | Mount Saint Mary, Millersville Pennsylvania |
| Ethan Rothstein | C | 2020-2020 | James Madison |
| Jake Rothwell | P | 2017-2019 | Kennesaw State, Daytona Beach CC |
| Joe Rotkis | P | 2020-2020 | Morehead State |
| Chris Rotondo | IF | 2018-2020 | Villanova |
| Ryan Rotondo | IF | 2015-2020 | Maryland-Eastern Shore, CC of Rhode Island, Rhode Island College |
| jack Rotteveel | c-of | 2017-2019 | Towson, Folsom Lake |
| Geoff Rottmayer | OF | 2006-2006 | Seminole State College, Pasco-Hernando CC, Florida Gulf Coast |
| Nick Rotunno | P | 2004-2004 | Valparaiso |
| Chris Rouches | OF-1B | 2007-2010 | Harvard |
| Matt Roueche | P | 2014-2017 | East Tennessee State, Cleveland State CC |
| Nick Rougeau | OF | 2012-2015 | Central Arkansas |
| Dalton Rouleau | SS | 2012-2015 | Hofstra, Allan Hancock College |
| Jeremy Roulin | SS-2B | 2004-2005 | UNC-Greensboro, West Valley College |
| Ben Rounds | OF | 2020-2020 | Harvard |
| Michael Rounds | P | 2019-2020 | Massachusetts |
| Devin Roundtree | OF | 2003-2003 | Saint Peter's |
| Kevin Roundtree | C | 2009-2012 | USC |
| Rance Roundy | OF | 2007-2011 | UNLV |
| Cameron Rountree | C | 2019-2020 | Wright State |
| Nick Rountree | C-IF | 2011-2012 | Ark-Little Rock, Redlands CC |
| Rich Rountree | OF | 2016-2019 | Delaware State |
| Landen Roupp | P | 2018-2020 | UNC Wilmington |
| Brian Rourke | P | 2017-2018 | College of Charleston, Frederick CC |
| Chip Rourke | C | 2001-2002 | Central Ct State |
| Andrew Rouse | IF | 2015-2018 | Marist |
| Chris Rouse | P | 2015-2015 | Savannah State, East Georgia |
| James Rouse | IF-OF | 2000-2004 | Memphis |
| Justin Rouse | IF | 2018-2020 | Coastal Carolina, Bellarmine |
| Nolan Rouse | IF | 2005-2007 | UCLA, Mount San Antonio College |
| Paul Rouse | OF | 2017-2020 | Central Arkansas |
| Quenten Rouse | C | 2005-2006 | SE Missouri State, Salem CC |
| Spencer Rouse | SS | 2016-2019 | Lafayette College |
| Aaron Rouser | OF | 2002-2004 | Toledo, Tiffin |
| Trae Rouser | OF | 2004-2005 | Jackson State |
| P.J. Rousey | P | 2006-2009 | Cal State Northridge |
| Brandon Roush | IF | 2011-2014 | Texas-Pan American |
| Chase Rousseau | P | 2013-2014 | Ark-Little Rock, New Mexico JC |
| Jeffrey Rousseau | C | 2012-2017 | Eastern Michigan, Fort Scott CC, Northwestern-OH |
| Austin Roussel | C | 2012-2015 | Southern Miss |
| Tanner Routh | P | 2018-2020 | Campbell, Guilford Tech, North Carolina at Pembroke |
| Steve Routos | SS | 1983-1986 | Washington |
| Patrick Routsis | P | 2020-2020 | Old Dominion |
| Ethan Routzahn | P | 2018-2020 | Dallas Baptist, Northwest Florida State College, St. John's |
| Anthony Rovasio | P | 2015-2015 | Hartford |
| Mason Rovenstine | C | 2009-2009 | Indiana U.-Purdue U.-FW |
| Justin Row | IF | 2014-2018 | South Carolina, Fullerton College |
| Brandon Rowan | P | 2003-2005 | Memphis, Northwest Mississippi CC |
| Chris Rowan | C | 2018-2020 | Utah |
| Kenny Rowan | IF | 2009-2011 | Alcorn State, Hinds CC |
| Dan Rowbottom | OF | 2015-2017 | Illinois |
| Ben Rowdon | SS | 2017-2020 | Stetson, Gulf Coast CC, Gardner-Webb |
| Ben Rowe | P | 2001-2004 | Oregon State |
| Braddock Rowe | C | 2013-2014 | Jacksonville, South Georgia College |
| Daniel Rowe | IF-OF | 2010-2011 | Eastern Illinois |
| James Rowe | P-OF | 2005-2007 | South Florida |
| Jamison Rowe | OF | 2010-2013 | Nevada |
| Justin Rowe | IF-OF | 2003-2003 | Maryland |
| Kyle Rowe | P | 2012-2013 | Georgia Southern, Santa Fe CC, Valdosta State |
| Ryan Rowe | P | 2006-2007 | Longwood |
| Stan Rowe | P-1B | 2011-2011 | Georgetown |
| Tim Rowe | OF | 2017-2018 | Mississippi, Itawamba CC |
| Kyle Rowekamp | OF | 2004-2006 | Tennessee Tech, Motlow State CC |
| Brent Rowell | P | 2003-2003 | SE Louisiana |
| Grant Rowell | OF-P | 2020-2020 | Florida A&M |
| Jake Rowell | IF | 2010-2011 | Ark-Little Rock, Angelina College |
| Ron Rowell | OF | 1967-1969 | Oklahoma |
| Steve Rowell | SS | 2001-2001 | New Orleans |
| Robert Rowen | IF-OF | 2004-2007 | Long Island-Brooklyn |
| Anthony Rowland | P | 2009-2012 | Wofford |
| Brad Rowland | P | 2007-2010 | Murray State |
| Cameron Rowland | P | 2013-2016 | Nevada, Chabot College, Diablo Valley |
| David Rowland | OF | 2005-2008 | Savannah State |
| Hampton Rowland | P | 2002-2002 | South Carolina |
| Jake Rowland | OF | 2012-2016 | Tennessee Tech, Tennessee |
| Matt Rowland | IF | 2016-2018 | Tulane |
| Nicholas Rowland | OF | 2017-2019 | Campbell, Harford CC, College of Charleston |
| Parker Rowland | C | 2020-2020 | Arkansas State |
| Ross Rowland | P | 2011-2014 | McNeese State |
| Ryan Rowland | P | 2006-2007 | Charleston Southern, Garden City CC |
| Steven Rowland | P | 2018-2018 | Houston Baptist |
| Tom Rowland | P | 2000-2002 | Princeton |
| Travis Rowland | P | 2017-2018 | Northern Kentucky, Sinclair CC |
| Tyler Rowland | P | 2004-2007 | Dallas Baptist |
| Jeff Rowlands | C | 1977-1977 | Miami |
| Zach Rowles | IF | 2008-2011 | Ark-Little Rock, Minnesota State University-Mankato |
| Blake Rowlett | IF | 2014-2017 | East Tennessee State, Jackson State CC |
| Brad Rowley | P | 2015-2016 | Central Florida |
| Danny Rowley | C | 2013-2017 | Missouri State, Eastern Arizona College |
| Darryl Rowley | P | 1987-1988 | Northeastern Oklahoma A&M College, Kansas State |
| Jared Rowley | P | 2018-2020 | Keystone College, Delaware Technical & CC |
| Jeff Rowley | OF | 2007-2008 | Marshall, Erie CC |
| Jesse Rowley | 1B | 2017-2019 | Cal State Bakersfield, Eastern Utah CC |
| Henry Rowling | OF | 2016-2016 | Georgia |
| Bryan Rowry | OF | 2011-2014 | Southern |
| David Rowse | P | 2007-2010 | Pacific |
| Adam Roy | IF | 2010-2010 | Northwestern State |
| Andy Roy | OF | 2002-2005 | Western Michigan |
| Brooks Roy | P | 2012-2013 | Liberty, Edmonds CC |
| Foster Roy | P | 2018-2020 | Richmond, Oral Roberts |
| Kevin Roy | P | 2013-2016 | Columbia |
| Robert Roy | IF | 2005-2006 | Sacred Heart |
| Taylor Roy | OF-P | 2011-2012 | Southern, Hutchinson CC |
| Richard Royal | C | 2008-2010 | South Carolina |
| Sid Royal | P | 2015-2017 | Georgia Southern, Armstrong Atlantic State |
| Brad Royer | OF | 2011-2012 | Southern Utah, Union U |
| Mark Royer | COACH | 2012-2012 | Eastern, Millersville Pennsylvania |
| Adam Royster | OF | 2002-2003 | Maryland, Brown |
| J.R. Royston | OF | 2001-2003 | Va Military Inst. |
| Mike Rozak | IF-OF | 2007-2010 | Maryland |
| Mickey Rozakis | C | 2005-2006 | Virginia Tech |
| Brennan Rozell | 2B | 2019-2020 | Long Beach State |
| Ben Rozenblum | C | 2020-2020 | Florida Intl |
| Stephen Rozenman | P | 2010-2010 | USC-Upstate |
| Taylor Rozier | IF-OF | 2010-2013 | Wofford |
| Peter Rozman | OF-P | 2017-2018 | Dayton |
| Andy Rozylowicz | P | 2016-2019 | UMD-Baltimore Cty |
| Caleb Rozypal | P | 2016-2020 | Prairie View A&M, Laredo CC |
| 1004 record(s) |
