| Johnny Adams | IF | 6-1 |
188 |
R-R |
1994-09-02 |
23 | Walpole,Massachusetts |
A | 2014-2018 | - | Walpole (Walpole,MA) | Boston Col | 2017-22- 663-SEA | Minors | Seattle Mariners (A-) |
| Grant Anderson | P | 6-0 |
180 |
R-R |
1997-06-21 |
21 | Beaumont,Texas |
A | 2018-2018 | - | West Orange-Stark (Orange,TX) | McNeese St | 2018-21- 628-SEA | Minors | Seattle Mariners (A) |
| Greifer Andrade | SS | 6-0 |
170 |
R-R |
1997-01-27 |
21 | Paramo Tucani,Venezuela |
A | 2014-2018 | - | | | 2013- UDFA-SEA | Free Agent | |
| Randy Bell | P | 5-10 |
185 |
R-R |
1995-02-11 |
23 | Baton Rouge,Louisiana |
A+ | 2017-2018 | - | Centreville Academy (Centreville,MS) | South Alabama, Hinds CC | 2017-10- 303-SEA | Minors | Seattle Mariners (A) |
| Scott Boches | P | 6-5 |
205 |
R-R |
1994-10-17 |
23 | Feasterville,Pennsylvania |
AA | 2017-2018 | - | Archbishop Wood (Warminster,PA) | Marist Col | 2017-30- 903-SEA | Minors | Seattle Mariners (A) |
| Louis Boyd | IF | 5-11 |
169 |
R-R |
1994-05-04 |
24 | North Vancouver,BC |
A+ | 2014-2018 | - | Sutherland Secondary (North Vancouver,BC) | Arizona, Cochise Col | 2017-24- 723-SEA | Minors | Seattle Mariners (A+) |
| Juan Camacho | C | 6-3 |
215 |
R-R |
1996-04-19 |
22 | Los Mochis,Mexico |
A | 2015-2018 | - | | | 2014- UDFA-SEA | Minors | Seattle Mariners (A) |
| Chris Castellanos | P | 5-10 |
185 |
L-L |
1995-05-08 |
23 | Long Beach,California |
AAA | 2015-2018 | - | Long Beach Poly (Long Beach,CA) | Stanford U. | 2017-33- 993-SEA | Free Agent | |
| Clay Chandler | P | 6-3 |
180 |
R-R |
1994-04-27 |
24 | La Center,Kentucky |
A | 2017-2018 | - | Ballard Memorial (Barlow,KY) | SE Missouri St, Wabash Valley Col | | Minors | Seattle Mariners (A-) |
| Matt Clancy | P | 5-11 |
170 |
L-L |
1994-04-01 |
24 | Norwood,New Jersey |
A | 2015-2018 | - | Northern Valley Regional (Old Tappan,NJ) | St. John's U. | 2015-13- 395-SEA | Free Agent | |
| Billy Cooke | OF-IF | 5-10 |
160 |
R-R |
1995-09-26 |
22 | Maitland,Florida |
A | 2015-2018 | - | Trinity Prep (Winter Park,FL) | Coastal Carolina U. | 2017- 8- 243-SEA | Minors | Seattle Mariners (A) |
| Ryan Costello | IF | 6-2 |
190 |
L-R |
1996-06-13 |
22 | Wethersfield,Connecticut |
A+ | 2015-2018 | - | Wethersfield (Wethersfield,CT) | Central Connecticut St | 2017-31- 933-SEA | Minors | Minnesota Twins (A+) |
| Adonis De La Cruz | OF | 6-2 |
170 |
R-R |
1994-12-20 |
23 | Santo Domingo,Dom Rep |
A | 2013-2018 | - | | | | Minors | New York Yankees (MLB) |
| Sam Delaplane | P | 5-11 |
175 |
R-R |
1995-03-27 |
23 | San Jose,California |
AAA | 2017-2018 | - | Leigh (San Jose,CA) | Eastern Michigan U. | 2017-23- 693-SEA | Minors | Seattle Mariners (AAA) |
| Dave Gerber | P | 6-1 |
175 |
R-R |
1994-09-24 |
23 | Naperville,Illinois |
AA | 2017-2018 | - | Naperville Central (Naperville,IL) | Creighton U. | 2017-29- 873-SEA | Minors | Seattle Mariners (A+) |
| Joey Gerber | P | 6-4 |
215 |
R-R |
1997-05-03 |
21 | Fridley,Minnesota |
A | 2018-2018 | - | Wayzata (Plymouth,MN) | Illinois | 2018- 8- 238-SEA | Minors | Seattle Mariners (A) |
| Marvin Gorgas | P | 5-9 |
185 |
R-R |
1996-01-19 |
22 | Chicago,Illinois |
AAA | 2014-2018 | - | East Hampton (East Hampton,CT) | | 2014-13- 381-SEA | Minors | Seattle Mariners (A) |
| Eugene Helder | SS | 5-11 |
165 |
R-R |
1996-02-26 |
22 | Oranjestad,Aruba |
AAA | 2015-2018 | - | | | | Minors | Seattle Mariners (AAA) |
| Connor Hoover | SS | 5-10 |
185 |
L-R |
1996-07-18 |
21 | Appling,Georgia |
AAA | 2015-2018 | - | Greenbrier (Evans,GA) | North Georgia Col & St | 2017-21- 633-SEA | Minors | Seattle Mariners (A) |
| Austin Hutchison | P | 6-1 |
185 |
R-R |
1995-04-09 |
23 | Dandridge,Tennessee |
AAA | 2017-2018 | - | Jefferson County (Dandridge,TN) | East Tennessee St, Mount Olive Col | 2017-26- 783-SEA | Minors | Seattle Mariners (A+) |
| Ryne Inman | P | 6-5 |
215 |
R-R |
1996-05-13 |
22 | Lawrenceville,Georgia |
A | 2015-2018 | - | Parkview (Lilburn,GA) | | 2015-15- 455-SEA | Minors | Seattle Mariners (A) |
| Tyler Jackson | P | 6-5 |
200 |
R-R |
1993-10-22 |
24 | Piedmont,South Carolina |
AAA | 2017-2018 | - | Wren (Piedmont,SC) | South Carolina-Upstate, South Carolina, South Carolina-Lancaster, Clemson U. | | Free Agent | |
| Oliver Jaskie | P | 6-3 |
210 |
L-L |
1995-11-17 |
22 | Ada,Michigan |
A | 2017-2018 | - | Grandville (Grandville,MI) | Michigan | 2017- 6- 183-SEA | Restricted | Seattle Mariners (A) |
| Raymond Kerr | P | 6-2 |
185 |
L-L |
1994-09-10 |
23 | Sacramento,California |
A | 2017-2018 | - | Hug (Reno,NV) | Lassen CC, Mendocino Col | | | |
| Collin Kober | P | 6-0 |
170 |
R-R |
1994-09-08 |
23 | Lake Charles,Louisiana |
AA | 2016-2018 | - | Sam Houston (Lake Charles,LA) | McNeese St | 2017-27- 813-SEA | Minors | Seattle Mariners (A+) |
| Jack Larsen | OF | 6-1 |
195 |
L-L |
1995-01-13 |
23 | Newport Beach,California |
A+ | 2014-2018 | - | Capistrano Valley (Mission Viejo,CA) | California-San Diego | | Minors | Seattle Mariners (A+) |
| Keegan McGovern | OF | 6-3 |
207 |
L-R |
1995-09-13 |
22 | Willacoochee,Georgia |
A | 2015-2018 | - | Coffee (Douglas,GA) | Georgia | 2018- 9- 268-SEA | Minors | Seattle Mariners (A) |
| Steve Moyers | P | 5-10 |
180 |
R-L |
1993-09-23 |
24 | East Longmeadow,Massachusetts |
AAA | 2016-2018 | - | East Longmeadow (East Longmeadow,MA) | Rhode Island | | Minors | Seattle Mariners (A) |
| Dimas Ojeda | LF | 6-1 |
195 |
L-L |
1995-09-19 |
22 | Fort Worth,Texas |
A | 2015-2018 | - | Haltom (Haltom City,TX) | McLennan CC | 2016-17- 507-SEA | Minors | Seattle Mariners (A) |
| Onil Pena | C | 6-0 |
180 |
R-R |
1996-11-06 |
21 | Salcedo,Dom Rep |
A | 2014-2018 | - | | | 2013- UDFA-SEA | Minors | Seattle Mariners (A) |
| Orlando Razo | P | 5-11 |
180 |
L-L |
1995-02-07 |
23 | San Francisco,California |
A+ | 2017-2018 | - | Junipero Serra (San Mateo,CA) | California-Davis | 2017-16- 483-SEA | Minors | Seattle Mariners (A) |
| Tommy Romero | P | 6-2 |
225 |
L-R |
1997-07-08 |
20 | Fort Lauderdale,Florida |
A | 2017-2018 | - | Coral Springs Charter (Coral Springs,FL) | Eastern Florida St, Polk St | 2017-15- 453-SEA | Minors | Tampa Bay Rays (A) |
| Joseph Rosa | SS | 5-10 |
165 |
B-R |
1997-03-06 |
21 | New York,New York |
AAA | 2015-2018 | - | | | | Minors | Seattle Mariners (A) |
| Matt Sanders | IF | 5-8 |
175 |
R-R |
1996-06-07 |
22 | Madison,Alabama |
AA | 2015-2018 | - | Bob Jones (Madison,AL) | Troy U. | 2018-10- 298-SEA | Minors | Seattle Mariners (A-) |
| Ariel Sandoval | OF | 6-2 |
180 |
R-R |
1995-11-06 |
22 | Sabana Grande De Boya,Dom Rep |
A+ | 2013-2018 | - | | | 2012- UDFA-LAN | Minors | Minnesota Twins (MLB) |
| Ryan Scott | C | 6-1 |
180 |
R-R |
1995-02-07 |
23 | Scottsdale,Arizona |
AAA | 2013-2018 | - | Notre Dame Prep (Scottsdale,AZ) | | 2013-30- 904-LAN | Free Agent | |
| Zach Scott | 2B | 6-0 |
185 |
L-R |
1995-04-27 |
23 | Scottsdale,Arizona |
A+ | 2014-2018 | - | | Saint Leo U., Colorado Christian U., Col. So.Nevada | 2018-32- 958-SEA | Minors | Seattle Mariners (A) |
| Rainis Silva | C | 6-1 |
183 |
R-R |
1996-03-20 |
22 | Barquisimeto,Venezuela |
AA | 2013-2018 | - | | | 2012- UDFA-MIN | Minors | Seattle Mariners (A) |
| Devin Sweet | P | 5-11 |
180 |
R-R |
1996-- |
22 | Greensboro,North Carolina |
A | 2015-2018 | - | Southeast Guilford (Greensboro,NC) | North Carolina Central U. | | Minors | Seattle Mariners (A-) |
| Nick Thurman | C | 6-2 |
210 |
L-R |
1993-09-09 |
24 | Belle Chasse,Louisiana |
A+ | 2013-2018 | - | Belle Chasse (Belle Chasse,LA) | UL Lafayette | | Minors | Seattle Mariners (A+) |
| Tyler Watson | P | 5-11 |
160 |
L-L |
1993-06-09 |
25 | Georgetown,Texas |
AAA | 2014-2018 | - | Georgetown (Georgetown,TX) | Kansas, McLennan CC | 2014-38-1139-ANA | Free Agent | |
| NIck Wells | P | 6-5 |
180 |
L-L |
1996-02-21 |
22 | Alexandria,Virginia |
A+ | 2014-2018 | - | Battlefield (Haymarket,VA) | | 2014- 3- 83-TOR | Minors | Seattle Mariners (A+) |
| Kyle Wilcox | P | 6-3 |
180 |
R-R |
1994-06-14 |
24 | Sandy Hook,Connecticut |
A+ | 2015-2018 | - | Newtown (Newtown,CT) | Bryant U. | 2015- 6- 185-SEA | Minors | Seattle Mariners (A+) |
| 43 Players |
