| David Alagna | IF | 2011-2011 | Old Dominion |
| Louie Alamia | OF | 2003-2006 | Texas-Pan American |
| David Alamillo | IF | 2019-2020 | San Diego State, Franklin Pierce University |
| George Alamillo | P | 2015-2018 | Pepperdine, East Los Angeles College, Cal State Los Angeles |
| Brandon Alamo | IF | 2018-2019 | Stony Brook |
| Richard Alamo | IF | 2016-2017 | Texas Southern |
| Emi Alaniz | OF | 2004-2004 | Texas State, St. Edward's |
| Austin Alarid | P | 2017-2020 | Texas-Pan American |
| Brendan Alas | IF | 2017-2019 | Northern Kentucky |
| Brian Alas | P | 2005-2009 | Richmond |
| Kevin Alas | IF | 2009-2011 | William and Mary |
| TJ Alas | IF-OF | 2013-2017 | Eastern Kentucky, Northern Kentucky |
| Mike Alati | OF | 2003-2006 | Niagara |
| Mehdi Alavi | C | 2009-2009 | Texas Tech, Vincennes |
| Jake Alba | P | 2018-2018 | Stony Brook |
| Luke Alba | IF | 2012-2012 | Stony Brook |
| Max Alba | P | 2020-2020 | North Carolina |
| Casey Albanese | IF | 2006-2009 | Louisville, Tampa, Manatee-Sarasota |
| Glenn Albanese | P | 2019-2020 | Louisville |
| Joe Albano | --- | 1997-2000 | Eckerd College |
| Josh Albat | P | 2020-2020 | Arkansas State |
| Chris Albaugh | P | 2007-2010 | Delaware Valley |
| Joe Albaugh | H | 1997-2000 | Michigan State |
| Trey Albaugh | OF | 2016-2019 | Abilene Christian, Alvin CC, Texas Lutheran |
| AJ Albee | IF | 2008-2011 | Rider |
| Bill Albee | COACH | 2006-2009 | Dubuque |
| Walter Albee | P | 2010-2012 | Brown |
| Kai Alberghini | OF | 2020-2020 | Seattle |
| Nate Alberius | P | 2015-2019 | Arkansas, Jackson State CC, Crowder, Arkansas State |
| Cole Albers | IF | 2018-2020 | Creighton, Iowa Western CC |
| Hagan Alberson | IF | 2019-2020 | Erskine College |
| Brian Albert | P | 2016-2019 | Indiana Pennsylvania |
| Campbell Albert | C | 2011-2014 | Greenville College |
| Greg Albert | P | 2018-2020 | UMD-Baltimore Cty |
| Jake Albert | P | 2016-2019 | Texas of the Permian Basin |
| Jeramy Albert | P | 2016-2019 | Lewis and Clark College |
| John Albert | P | 2012-2015 | Hawaii Pacific |
| Josh Albert | H | 2005-2005 | Duke |
| Matt Albert | C-1B | 2015-2018 | Eastern Illinois, Kishwaukee College |
| Reese Albert | OF | 2018-2020 | Florida State |
| Ryan Albert | P-IF | 2011-2013 | Princeton |
| Tyler Albert | C | 2013-2014 | Pittsburgh, Cecil College |
| Blaine Alberta | P | 2009-2010 | South Dakota State, Fresno City College |
| Brandon Alberto | P | 2016-2020 | New York Tech |
| Brock Alberts | P | 2007-2008 | Iowa, Southeastern CC, Mount Mercy College |
| Sam Alberts | P | 2007-2007 | Davidson College |
| Daniel Albino | IF | 2009-2009 | Marist |
| Keiki Albino | IF-OF | 2006-2007 | Utah Valley U |
| Marcelo Albir | P | 2003-2006 | Miami |
| Brooks Albrecht | OF | 2009-2010 | Minnesota |
| Chris Albrecht | P | 2004-2005 | Gonzaga, George Fox |
| Evan Albrecht | IF | 2019-2020 | Purdue |
| Jeff Albrecht | P | 2014-2017 | Creighton |
| Justin Albrecht | P | 2004-2004 | St. Mary's (CA) |
| Nate Albrecht | P | 2016-2019 | Minnesota, Crookston |
| Adam Albright | P | 2006-2008 | Sam Houston State, San Jacinto |
| Addison Albright | P | 2016-2016 | Georgia |
| Chad Albright | P | 2007-2007 | Bowling Green State, Heidelberg College |
| Chip Albright | P | 1999-2002 | Eastern Kentucky |
| Cody Albright | P | 2013-2014 | Liberty, Cecil College |
| Justin Albright | IF | 2010-2013 | George Washington |
| Kyle Albright | OF | 1999-2000 | Palomar College, Cal Poly |
| Luke Albright | P | 2019-2020 | Kent State |
| Reese Albright | OF | 2016-2019 | Baldwin-Wallace College |
| Tyler Albright | C | 2008-2011 | Harvard |
| Tyler Albright | IF | 2014-2018 | Tennessee-Martin, Oakton CC |
| Daniel Albrittain | P | 2018-2020 | Elon |
| Jason Albritton | P | 1996-1998 | LSU |
| Jeremy Albritton | C | 1998-1998 | Southern Miss |
| Josh Albritton | 1B | 2014-2017 | Auburn-Montgomery |
| Nick Albu | P | 2000-2002 | Eastern Illinois |
| Joe Albunia | P | 2018-2020 | Saint Peter's |
| Mike Albunia | C-IF | 2016-2019 | New Jersey City |
| Aaron Albus | P | 2003-2003 | Texas Tech, Ranger College |
| Daniel Alcaire | IF | 2008-2009 | St. Mary's (CA) |
| Dan Alcala | P | 2009-2012 | William Paterson New Jersey |
| Robert Alcala | P | 2010-2010 | San Diego State, Fresno City College |
| Ruben Alcala | IF | 2018-2020 | Texas Southern, Brookhaven College |
| Gabe Alcantar | IF | 2006-2008 | Santa Clara, De Anza |
| AJ Alcantara | OF | 2014-2017 | UC Irvine |
| Eric Alcantara | 3B-SS | 2013-2013 | Arkansas-Pine Bluff |
| Jason Alcaraz | OF | 1996-1999 | Michigan |
| Gregg Alcazar | C | 2010-2011 | Texas A&M, San Jacinto |
| Jacob Alcorn | P | 2016-2020 | San Francisco, Long Beach City College, Nebraska at Omaha |
| Jordan Alcott | IF-OF | 2002-2003 | University at Buffalo |
| Jackson Aldam | P | 2016-2019 | Sacred Heart |
| Jesus Aldaz | P | 2018-2020 | Texas-Pan American, South Mountain CC, Yavapai College |
| Nate Alden | IF | 2003-2004 | UNC-Greensboro, John A. Logan College |
| Rhys Aldenhoven | P | 2013-2014 | Pittsburgh, Hill College |
| Tyler Alderfer | P | 2017-2017 | Belmont |
| Aaron Alderman | H | 2006-2016 | Arkansas-Pine Bluff, Salem International |
| Evan Alderman | OF | 2014-2017 | Georgia Southwestern State |
| Travis Alderman | OF | 2002-2004 | Fairleigh Dickinson, Raritan Valley CC |
| Trey Alderman | P | 2017-2020 | Radford, Marshall |
| Alex Alders | OF | 2017-2020 | Wright State |
| Bryn Alderson | P | 2000-2003 | Dartmouth |
| Adam Aldred | P | 2013-2016 | Central Michigan |
| Chris Aldrich | P | 2003-2006 | Sacred Heart |
| Conner Aldrich | IF | 2020-2020 | Charleston Southern |
| Jack Aldrich | P | 2019-2020 | Santa Clara, Santa Barbara City College, Tulane |
| Jaime Aldrich | OF | 2004-2007 | Holy Cross |
| Kyle Aldrich | P-1B | 2010-2013 | Washington College |
| Mike Aldrich | IF | 2010-2011 | Hartford, Connecticut-Avery Point |
| Miller Aldrich | P | 2007-2010 | Dartmouth, Lamar, Angelina College |
| Stephen Aldrich | OF | 1999-2002 | Davidson College |
| Stephen Aldrich | P | 2019-2020 | Monmouth |
| Bryce Aldridge | C-OF | 2015-2018 | Wabash College, Indianapolis |
| Charles Aldridge | IF | 2011-2014 | Grambling State, Kirkwood CC, Alcorn State |
| Chase Aldridge | IF | 2016-2019 | Harvard |
| Darrian Aldridge | OF | 2016-2020 | Arkansas-Pine Bluff, Pratt CC |
| Justin Aldridge | 3B | 2009-2009 | UNLV, Delgado CC, Lake Sumter CC |
| Preston Aldridge | OF | 2011-2012 | Saint Peter's, Jefferson College |
| Billy Alec | P | 2006-2008 | Lehigh |
| William Alec | P | 2005-2005 | Lehigh |
| Haneef Aleem | OF | 2007-2008 | Texas Southern, Coastal Ala |
| Ray Alejo | IF | 2016-2020 | Mississippi, Northwest Florida State College, Central Florida, Texas A&M |
| Franco Aleman | P | 2019-2020 | Florida Intl, St. Johns River CC, Florida |
| Jesus Aleman | P-1B | 2010-2010 | Miss. Valley St, East Central CC |
| Matt Aleman | OF | 2010-2011 | Delaware State |
| Sal Aleman | H | 2005-2005 | South Alabama |
| Alex Alemann | P | 2010-2013 | Saint Louis |
| Anthony Alepra | P | 2018-2020 | Northwestern |
| Chris Alessandria | IF-OF | 2007-2010 | Appalachian State, Polk State, Florida Gulf Coast |
| Robbie Alessandrine | SS | 2013-2016 | Monmouth |
| Andrew Alexander | C | 2003-2007 | UNC Asheville |
| Blake Alexander | IF | 2014-2018 | Dallas Baptist, Elgin CC, St. Edward's |
| Brandon Alexander | H | 2008-2008 | Coppin State College |
| Brandon Alexander | OF | 2012-2013 | John A. Logan College, Louisiana-Monroe |
| Clay Alexander | OF | 2007-2009 | Louisiana Tech |
| Clint Alexander | IF | 2005-2006 | Tennessee Tech |
| Cole Alexander | OF-P | 2020-2020 | Central Arkansas |
| Connor Alexander | P | 2015-2018 | Memphis |
| Cory Alexander | H | 2004-2005 | Texas Southern |
| Cory Alexander | OF | 2016-2019 | Old Dominion |
| Craig Alexander | C-1B | 2001-2004 | Lafayette College |
| Dennis Alexander | 2B-SS | 2005-2008 | Saint Peter's |
| Don Alexander | P | 1991-1994 | Northern Colorado |
| Donald Alexander | OF | 2004-2004 | Grambling State |
| Dylan Alexander | C | 2014-2017 | Cal State Northridge |
| Elijah Alexander | OF | 2017-2020 | Texas-Pan American, Ventura College |
| Evan Alexander | P | 2006-2006 | Princeton |
| Grant Alexander | C | 2005-2005 | Washington State, New Mexico JC |
| Hunter Alexander | IF | 2015-2018 | Alabama, St. Johns River CC |
| Isaac Alexander | SS | 2018-2020 | Jacksonville State |
| Ivory Alexander | C | 2010-2012 | Akron |
| Jack Alexander | C | 2019-2020 | Notre Dame, Austin Peay |
| Jared Alexander | P | 2008-2009 | Hawaii, Cosumnes River College |
| John Alexander | IF | 2012-2014 | Oklahoma State, Panola College, St. Edward's |
| Jordan Alexander | OF | 2012-2012 | UC Irvine |
| Joshua Alexander | OF | 2011-2012 | Utah |
| Justin Alexander | P | 2011-2014 | Tennessee Tech |
| Luke Alexander | DH-IF | 2002-2003 | Oklahoma, Panola College |
| Luke Alexander | IF | 2016-2018 | Mississippi State |
| Matt Alexander | 1B | 2007-2010 | Air Force |
| Matt Alexander | IF | 2001-2004 | Texas A&M |
| Matt Alexander | OF | 2000-2004 | UW Milwaukee, Northern Illinois |
| Matt Alexander | C | 2001-2002 | Trinidad State Junior College, New Mexico |
| Mike Alexander | C | 2013-2014 | Delaware State, Salem CC |
| Mitchell Alexander | OF | 2014-2015 | New Orleans |
| Nick Alexander | P | 1998-2001 | Michigan |
| Sean Alexander | OF | 2003-2005 | Texas Tech, Cal Poly, Bakersfield College |
| Tommy Alexander | P | 2013-2017 | Old Dominion, Mansfield Pennsylvania |
| Xavier Alexander | SS | 2007-2007 | Louisiana-Lafayette, Paris Junior College |
| Reese Alexiades | OF | 2018-2020 | Pepperdine |
| Kevin Alexy | 1B | 2016-2019 | Southern New Hampshire |
| Dominic Alfano | IF | 2016-2019 | Assumption College |
| Nick Alfano | OF | 2010-2013 | Wagner |
| Alex Alfonso | IF | 2006-2006 | Florida Intl |
| Matt Alfonso | IF | 2019-2020 | Manhattan College |
| Miguel Alfonso | P | 2006-2006 | Florida Intl |
| Nik Alfonso | SS-2B | 2013-2015 | South Florida |
| Raiko Alfonso | IF | 2009-2012 | Florida Intl, Tampa |
| Raudel Alfonso | P | 2005-2006 | Miami, Miami-Dade College |
| Ricky Alfonso | OF | 2012-2015 | Indiana |
| Beau Alford | P-OF | 2003-2003 | East Tennessee State |
| Bobby Alford | P | 2000-2003 | Tennessee-Martin |
| Jeremy Alford | OF | 2001-2004 | Louisiana Tech, LSU, Grayson County College |
| Josh Alford | P-IF | 2009-2012 | Va. Commonwealth |
| Matthew Alford | IF | 2014-2017 | Northwestern State |
| Peyton Alford | P | 2017-2020 | Virginia Tech, Walters State CC |
| Tom Alford | IF | 2002-2004 | Jacksonville |
| Jesse Alfreno | P | 2009-2011 | Penn State |
| Asaad Ali | C | 2010-2010 | Louisville |
| Dean Ali | P | 2011-2014 | Old Dominion |
| Wahid Ali | IF | 2017-2017 | Georgia State, Georgia Perimeter College |
| Aaron Alicea | C | 2004-2004 | Fairleigh Dickinson |
| Kevin Alicea | P | 2017-2020 | Norfolk State, Rainy River CC |
| Michael Alicea | UT | 2018-2020 | North Carolina Central, Miami-Dade College |
| Luke Alicknavitch | P | 2012-2015 | Delaware |
| Justin Alintoff | P | 2018-2020 | Florida, Indian River CC |
| Ridge Alkonis | P | 2007-2008 | Navy |
| Kollyn All | C | 2019-2020 | Butler |
| Drew Allain | OF-C | 2008-2009 | Tulane, Delgado CC |
| Luke Allain | P | 2019-2020 | Bucknell |
| James Allan | 1B | 2004-2007 | Washington |
| Andrew Allar | P | 2004-2004 | Texas Christian, McMurry |
| Chris Allard | P | 2011-2014 | Truman State |
| Conor Allard | C | 2018-2020 | Nevada |
| Greg Allard | P | 2020-2020 | Stony Brook |
| Jamie Allard | P | 2012-2015 | Fairmont State College |
| Kevin Allard | P | 2010-2013 | Plymouth State University |
| Mark Allard | P | 1975-1978 | Bradley |
| Jason Allbery | IF | 2017-2020 | Creighton |
| Nick Allbritton | P | 2012-2013 | North Florida, Gulf Coast CC |
| Chris Allderdice | P | 2008-2008 | Bucknell |
| Brian Allec | P | 2014-2017 | Texas A&M-Corpus Christi, Cal State East Bay |
| Christian Allegretti | P | 2018-2019 | Bryant University, St. Thomas Aquinas |
| Michael Allegretti | P | 2008-2011 | Savannah State |
| Peter Allegro | P | 2019-2020 | Portland |
| David Alleman | OF | 2008-2009 | Texas A&M |
| Logan Alleman | P | 2017-2017 | Nicholls State |
| Adam Allen | P | 2008-2008 | Florida |
| Ashley Allen | H | 2004-2004 | Alabama State |
| Ben Allen | IF | 2007-2010 | Bucknell |
| Ben Allen | IF | 2006-2009 | East Tennessee State |
| Blake Allen | IF | 2013-2015 | Middle Tenn State, Motlow State CC |
| Blake Allen | P | 2016-2016 | Baylor |
| Brad Allen | P | 2017-2018 | Eastern Michigan |
| Brady Allen | P | 2019-2020 | South Carolina |
| Brandon Allen | P | 2013-2015 | Western Kentucky, Wabash Valley College |
| Brendon Allen | P | 2013-2017 | Eastern Illinois, Jefferson College |
| Brycen Allen | P | 2020-2020 | Florida Atlantic |
| Bryson Allen | OF | 2013-2016 | Southeastern Oklahoma State, Seward County CC |
| Caleb Allen | P | 2016-2019 | Schreiner |
| Cameron Allen | P-IF | 2012-2015 | Ark-Little Rock |
| Casey Allen | P | 2006-2009 | Air Force |
| Chad Allen | IF | 2007-2007 | Murray State |
| Chris Allen | OF | 2019-2019 | Maryland-Eastern Shore |
| Cody Allen | OF | 2006-2008 | Central Michigan |
| Cody Allen | P | 2016-2019 | Incarnate Word |
| Connor Allen | 1B | 2018-2020 | Miami, Central Florida |
| Cory Allen | IF | 2007-2007 | Evansville |
| Cory Allen | P | 2003-2003 | Dayton |
| David Allen | OF | 2013-2015 | Tennessee Tech |
| Deric Allen | OF-P | 2009-2009 | Chicago State |
| Dorian Allen | P | 2001-2002 | Jackson State |
| Drew Allen | IF | 2013-2013 | Memphis, Walters State CC |
| Dylan Allen | IF | 2014-2018 | Liberty |
| Eric Allen | OF | 2007-2007 | Delaware State, Vincennes |
| Eric Allen | H | 2008-2008 | Morehead State |
| Fairon Allen | OF | 2003-2003 | Louisiana Tech |
| Gary Allen | 3B | 1978-1978 | LSU |
| Gregg Allen | OF-C | 2006-2007 | Rhode Island, CC of Rhode Island |
| Grover Allen | P | 2005-2005 | Louisiana Tech, Holmes CC |
| Hunter Allen | IF | 2012-2015 | East Carolina, Brunswick CC |
| Hunter Allen | C | 2015-2018 | Alabama State |
| Ian Allen | P | 2014-2017 | East Stroudsburg Pennsylvania |
| Jacob Allen | IF | 2006-2007 | Campbell |
| Jake Allen | 2B | 2000-2002 | Tennessee Tech |
| Jake Allen | OF | 2008-2008 | Air Force |
| Jake Allen | C | 2016-2019 | Harvard |
| James Allen | P | 2002-2003 | Kansas State, Colby CC, New Mexico State |
| Jared Allen | OF | 2012-2014 | Tennessee, Walters State CC, Middle Tenn State |
| Jeff Allen | P | 2016-2019 | Indiana Pennsylvania |
| Jimmy Allen | 2B-SS | 2019-2020 | Western Michigan |
| John Allen | P | 2012-2014 | Campbell, Louisburg College, East Carolina |
| Johnny Allen | C | 2008-2009 | Mississippi State, Pearl River CC |
| Jojo Allen | IF | 2017-2020 | Tennessee-Martin, Barton College |
| Jon Allen | P | 2004-2004 | Miami |
| Jonathan Allen | P | 2019-2020 | New Orleans, Gulf Coast CC |
| Jordon Allen | P | 2007-2008 | Central Ct State |
| Justin Allen | OF | 2011-2015 | Delaware State |
| Justin Allen | OF | 2014-2014 | USC-Upstate |
| Justin Allen | IF | 2015-2016 | UC Davis |
| Keyon Allen | OF | 2014-2018 | UNLV, El Camino College, Cal State Los Angeles |
| Kobi Allen | OF | 2017-2018 | Pacific |
| Kyle Allen | P | 2012-2015 | Butler |
| Lee Allen | 1B-3B | 2003-2003 | College of Charleston, East Carolina |
| Levonte Allen | 1B | 2013-2014 | Bethune-Cookman, Scottsdale CC |
| Logan Allen | P | 2018-2020 | Florida Intl |
| Logan Allen | IF | 2018-2020 | Bryant University |
| Lucas Allen | P | 2007-2009 | Murray State, Fort Scott CC |
| Lucas Allen | C | 2019-2020 | Northern Colorado |
| Lyle Allen | OF | 2008-2009 | Georgia |
| Marcerio Allen | IF | 2020-2020 | Kennesaw State |
| Matt Allen | P | 2014-2014 | Iowa |
| Matt Allen | P | 2014-2017 | Towson |
| Matt Allen | OF | 2001-2002 | Portland |
| Matt Allen | C | 2015-2018 | Liberty, Santa Fe CC |
| Matt Allen | P | 2013-2016 | Mesa State College |
| Max Allen | P | 2012-2016 | Georgetown |
| McCae Allen | P | 2017-2020 | Wagner, Neosho County CC. |
| Mike Allen | IF | 2010-2014 | Siena College |
| Mitchell Allen | P-IF | 2017-2020 | New Mexico State, Glendale CC AZ |
| Nick Allen | 2B-OF | 2010-2013 | George Mason |
| Peter Allen | OF | 2005-2008 | Fairfield |
| Phillip Allen | OF | 2005-2008 | Texas-San Antonio |
| Raymond Allen | 2B | 2006-2009 | Dartmouth |
| Richie Allen | OF | 2010-2010 | Eastern Kentucky, Lower Columbia CC |
| Roy Allen | --- | 2005-2006 | Northern Colorado, Colby College, Lamar CC |
| Ryan Allen | P | 2007-2010 | Missouri, Central Missouri |
| Ryan Allen | 2B-SS | 2011-2015 | Gardner-Webb, Belmont Abbey College |
| Sam Allen | P | 2008-2008 | Duke |
| Scott Allen | 3B | 1999-2002 | Creighton, Iowa State |
| Sean Allen | COACH | 1998-2001 | Houston |
| Shane Allen | IF | 2013-2016 | Northeastern |
| Tanner Allen | OF | 2018-2020 | Mississippi State |
| TJ Allen | P | 1999-2002 | Tennessee-Martin |
| Todd Allen | OF | 2008-2008 | Vermont, Herkimer County CC |
| Tom Allen | IF | 2001-2002 | Cleveland State |
| Trent Allen | P | 2018-2018 | Wichita State |
| Trevor Allen | P | 2020-2020 | San Jose State |
| Trevor Allen | IF-P | 2016-2019 | Saint Michael's College |
| Tyler Allen | P | 2006-2007 | Georgia State |
| Tyler Allen | OF | 2014-2014 | Virginia |
| Wilhelm Allen | P | 2017-2020 | Southern |
| Winston Allen | P | 2018-2020 | Delaware |
| Zach Allen | IF | 2011-2011 | Stephen F. Austin |
| Zachery Allen | P | 2000-2003 | Bucknell |
| Nestor Allende | OF | 2005-2005 | Chicago State |
| Ryan Allender | P | 2016-2019 | Husson College |
| Cameron Allerheil | IF | 2014-2014 | Lamar, Weatherford College |
| Jeff Alleva | P | 2001-2003 | Duke |
| Jake Alley | P | 1999-2003 | Southern Illinois |
| Sean Alley | IF | 2001-2002 | Cal State Fullerton, El Camino College |
| Trent Alley | P | 2017-2020 | Furman |
| Chris Alleyne | IF | 2018-2020 | Maryland |
| Craig Alleyne | OF | 2016-2018 | Fairleigh Dickinson, Towson, Rowan-Gloucester |
| Ryan Allgrove | IF | 2009-2012 | Fresno State, UC Davis, College of San Mateo |
| Trent Allianic | P-IF | 2010-2010 | Hawaii, Ohlone College |
| Cam Allie | OF | 2019-2019 | Santa Clara |
| Jason Allinder | C | 2009-2013 | Niagara, UMD-Baltimore Cty |
| Robert Allinder | OF | 1974-1976 | Kansas |
| Matt Alling | OF | 2004-2006 | Samford, Alabama |
| Austin Allinger | P | 2016-2019 | Evansville |
| Austin Allison | IF | 2009-2013 | Samford |
| Cameron Allison | P | 2017-2020 | Louisiana-Monroe, Northwest Florida State College, Howard College, Georgetown College |
| Carson Allison | OF | 2018-2020 | Southern Miss, Chattahoochee Val |
| Joe Allison | P | 2008-2010 | Arizona |
| Jonathan Allison | OF | 2013-2015 | Lipscomb, Volunteer State CC |
| Josh Allison | OF-C | 2002-2006 | Arkansas State |
| Luke Allison | IF | 2016-2020 | Appalachian State, Volunteer State CC, Motlow State CC |
| Josh Allman | P | 2009-2012 | Tennessee |
| Brien Allmaras | OF-P | 2005-2005 | Chicago State |
| Cameron Allmendinger | IF | 2008-2011 | Furman |
| Will Allocca | C-IF | 2018-2019 | Virginia |
| Ralph Alloco | IF | 2011-2014 | Canisius College, Dayton, Monroe CC |
| Justin Allred | P | 2002-2003 | San Francisco, UC San Diego |
| Kenny Allred | OF | 2018-2020 | Alabama State, Southeast CC, Allen County CC |
| Major Allred | 1B-OF | 1999-2002 | Samford |
| Toby Allred | IF | 2018-2020 | Western Illinois, Cochise College |
| Jared Allsbrooks | C | 2003-2003 | Murray State |
| Nick Allsop | C | 2006-2007 | Wright State |
| Taylor Allum | IF-OF | 2015-2018 | Kennesaw State |
| Fernando Almaguer | P | 2005-2008 | Prairie View A&M |
| Jeremy Almaguer | IF | 2018-2020 | Grambling State, Central Alabama CC |
| Mark Almaguer | P | 2008-2010 | Prairie View A&M |
| Pete Almaguer | 2B-3B | 1979-1980 | LSU |
| Brian Almand | IF | 2013-2016 | Bloomsburg Pennslyvania |
| Christian Almanza | IF | 2019-2020 | Utah |
| Amado Almanzar | P | 2017-2020 | Texas-Pan American, Ranger College, Texas A&M-Kingsville |
| Dominik Almanzar | IF | 2008-2008 | Southern |
| Brent Almeida | P | 2009-2010 | Bryant University |
| Oscar Almeida | P | 2010-2013 | New Mexico, New Mexico Highlands |
| Jacob Almendarez | IF-OF | 2016-2019 | Texas State |
| Luke Almendarez | IF-P | 2020-2020 | Houston |
| Andy Almonte | IF | 2012-2013 | Kennesaw State, Gordon State |
| Eddie Almonte | C | 2007-2008 | Northern Iowa, East Los Angeles College |
| Ismael Almonte | P | 2000-2002 | New York Tech |
| Jose Almonte | 2B | 2004-2007 | Bethune-Cookman |
| Andy Almquist | P | 2016-2019 | Miami |
| Alan Alonso | IF-OF | 2019-2020 | Lake Sumter CC |
| Franco Alonso | IF | 2020-2020 | Cornell |
| Nick Alonzo | P | 2015-2018 | Eckerd College |
| Sean Alonzo | OF | 2014-2014 | Incarnate Word |
| Jamie Aloy | 1B-P | 1997-2000 | Hawaii |
| Brandon Alphin | P | 2012-2015 | Louisville |
| Quentin Alsbrooks | P | 2018-2018 | Alabama A&M, Paine College |
| Taylor Alspaugh | OF | 2011-2015 | Baylor, Oklahoma |
| Antoine Alston | P | 2004-2005 | Norfolk State, Virginia Union |
| Elliott Alston | IF | 2009-2011 | Maryland-Eastern Shore, Seward County CC |
| Jimmy Alstot | P | 2002-2005 | UC Irvine |
| Lance Alsup | P | 2009-2009 | Tennessee-Martin, Chattanooga |
| Ryan Alsworth | P | 2015-2018 | Cal Poly Pomona |
| Sam Alt | OF | 2012-2015 | North Dakota |
| Jose Altalano | P | 2012-2012 | Southern |
| Kevin Altamirano | P-3B | 2018-2020 | Cal State Bakersfield |
| Tanner Altares | OF | 2001-2004 | Ark-Little Rock, Northeastern State |
| Dean Altavilla | C | 2003-2004 | Radford, Garrett College |
| Nick Altavilla | OF | 2011-2014 | North Dakota State, College of Southern Idaho |
| Brad Altbach | P | 2007-2010 | Bradley |
| Ryan Altenberger | IF | 2018-2020 | Xavier |
| Anthony Altieri | P | 2012-2015 | Montclair State |
| Chris Altieri | IF | 2007-2008 | Le Moyne, Florida Intl |
| Jeff Altieri | P-1B | 2000-2003 | Massachusetts |
| Joe Altieri | C | 2013-2014 | South Florida |
| Rob Altieri | SS-2B | 2004-2007 | James Madison |
| Zach Altieri | P | 2016-2018 | Hofstra |
| Chris Altimont | OF | 2014-2016 | Abilene Christian |
| Thomas Altimont | P | 2011-2015 | Arkansas, McLennan CC, Abilene Christian |
| Chris Altman | 1B | 2002-2005 | The Citadel |
| Clay Altman | C | 2012-2015 | Winthrop |
| John Altman | P | 2018-2020 | Lamar, Paris Junior College |
| Kent Altman | P | 2007-2009 | Coastal Carolina |
| Nick Altman | P | 2011-2013 | UC Davis, Solano CC (CA) |
| Roy Altman | P | 2003-2004 | Columbia |
| Alec Altmyer | P | 2015-2019 | Illinois State, Heartland CC, Illinois at Springfield |
| Nick Altobella | P | 2014-2015 | Alabama-Birmingham |
| Paul Altomonte | IF | 2003-2003 | Central Ct State, Rockland CC |
| Sam Alton | P | 2014-2016 | Middle Tenn State, Canada College |
| Chris Altopiedi | P | 2017-2019 | La Salle, Frederick CC, Flagler College |
| Braydon Altorfer | C | 2019-2020 | Air Force |
| Scott Altrichter | IF | 2006-2006 | Lehigh |
| Nathan Altstadt | P | 2017-2017 | Alabama |
| Cameron Alvarado | IF | 2012-2012 | Gonzaga |
| Jeremy Alvarado | 1B | 2014-2017 | Missouri Western State University, Oxnard College |
| Nick Alvarado | P | 2017-2020 | Illinois State, Illinois at Springfield, Purdue |
| Albert Alvarez | IF | 2010-2012 | San Diego State, Arizona Christian, Arizona, Yavapai College |
| Alec Alvarez | IF | 2014-2018 | Kent State, Johnson County CC, Missouri Southern State University |
| Andrew Alvarez | P-IF | 2013-2016 | Houston Baptist, Pepperdine, Orange Coast College |
| Andrew Alvarez | P | 2018-2020 | Cal Poly |
| Carlos Alvarez | P | 2002-2002 | Florida Intl |
| Dan Alvarez | P | 2005-2005 | Seton Hall |
| Daniel Alvarez | P | 2016-2020 | UC Irvine, El Camino College, Cumberland |
| Daniel Alvarez | P | 2016-2019 | Coppin State College |
| Danny Alvarez | IF | 2018-2018 | Pittsburgh |
| Edgar Alvarez | B | 2008-2010 | Alcorn State, Gateway CC |
| Erik Alvarez | IF | 2003-2006 | Southern Illinois |
| Frankie Alvarez | C | 2014-2016 | Arkansas State, Garden City CC |
| Grant Alvarez | 1B | 2013-2014 | Akron, Gulf Coast CC |
| Jake Alvarez | IF | 2011-2014 | Fresno State |
| Jason Alvarez | P | 2017-2020 | Grambling State, Monroe CC |
| Javier Alvarez | P | 2014-2017 | Youngstown State, Los Angeles Harbor College |
| Joey Alvarez | C | 2001-2001 | Texas State |
| Julian Alvarez | OF | 2020-2020 | California Baptist |
| Manny Alvarez | IF | 2011-2011 | Campbell |
| Mikel Alvarez | IF | 2008-2011 | Florida Gulf Coast |
| Patrick Alvarez | 3B | 2020-2020 | North Carolina |
| Ricardo Alvarez | OF | 2007-2007 | Southern Utah, Texas of the Permian Basin |
| Roger Alvarez | SS | 2003-2004 | Mercer, Palm Beach State College |
| Ryan Alvarez | IF | 2014-2015 | San Diego State |
| Ryan Alvarez | OF | 2016-2017 | Miami, Nova Southeastern |
| Taylor Alvarez | P | 2013-2015 | College of Charleston, Lander |
| Wilfredo Alvarez | IF | 2017-2020 | Florida Atlantic, Pensacola State College |
| Julio Alverez | H | 2004-2004 | Texas Southern |
| Adam Alverson | 1B | 2002-2003 | Pacific, Chabot College |
| Cody Alvey | P | 2010-2010 | Eastern Kentucky |
| Dustin Alvey | C-OF | 2005-2008 | Cincinnati |
| Carlos Alviarez | OF | 2016-2020 | Coppin State College |
| Joel Alvira | P | 2012-2013 | Alabama State |
| Will Alvis | P-IF | 2007-2011 | Louisiana Tech, Sam Houston State |
| Alex Alvord | C | 2017-2017 | Mercer |
| Zachary Alvord | 2B | 2011-2013 | Auburn, Tampa |
| Brent Alwine | IF | 2003-2006 | Indiana U.-Purdue U.-FW |
| Jeff Alwine | OF-IF | 2000-2003 | Hofstra |
| 445 record(s) |
