| 35 | Taylor Ard | 1B | A | 6-2 | 225 | Right | Right | 1/31/1990 | 21 | Vancouver,Washington | 2012 | 7 | 221 | SEA |
|
| 20 | Sal Arena | C | NCAA | 6-1 | 198 | Right | Right | 10/6/1991 | 19 | Tacoma,Washington | | UDFA | | |
| 23 | Matt Argyropoulos | 3B | A | 6-2 | 184 | Right | Right | 8/24/1988 | 22 | Longview,Washington | 2011 | 27 | 828 | COL |
| 4 | Chad Arnold | P | NCAA | 6-3 | 210 | Right | Right | 9/7/1987 | 23 | Kennewick,Washington | 2010 | 18 | 562 | LAD |
| 2 | Cody Bartlett | 2B-3B | RK | 5-7 | 168 | Right | Right | 7/22/1988 | 22 | Kent,Washington | 2011 | 41 | 1249 | TOR |
| 33 | Nate Blackham | OF | NCAA | 5-8 | 172 | Left | Left | 1992 | 19 | Everett,Washington | | UDFA | | |
| 47 | Kellen Camus | P | NCAA | 5-9 | 185 | Right | Right | 1992 | 19 | Olympia,Washington | | UDFA | | |
| 11 | Patrick Claussen | 3B | RK | 6-1 | 180 | Left | Right | 4/12/1990 | 21 | Bellevue,Washington | 2012 | 34 | 1037 | MIA |
| 39 | Paul Clingan | C | NCAA | 6-0 | 193 | Right | Right | | - | Lynnwood,Washington | | UDFA | | |
| 29 | Adam Conley | P | AA | 6-3 | 170 | Left | Left | 5/24/1990 | 21 | Olympia,Washington | 2011 | 2 | 72 | FLA |
| 8 | Bret Derooy | P | NCAA | 5-10 | 160 | Left | Left | | - | Woodinville,Washington | | UDFA | | |
| 13 | Anthony Drobnick | P | NCAA | 6-3 | 190 | Right | Right | | - | Seattle,Washington | | UDFA | | |
| 22 | Spencer Jackson | P | NCAA | 6-0 | 200 | Left | Left | 3/30/1990 | 21 | Houston,Texas | | UDFA | | |
| 15 | Brett Jacobs | OF | NCAA | 6-0 | 178 | Right | Right | 1991 | 20 | Richland,Washington | | UDFA | | |
| 1 | Kyle Johnson | RF-CF | A | 5-10 | 170 | Right | Right | 11/9/1989 | 21 | Portland,Oregon | 2012 | 25 | 777 | LAA |
| 25 | Derek Jones | RF | A | 6-0 | 213 | Left | Left | 6/3/1990 | 21 | Everett,Washington | 2012 | 8 | 258 | COL |
| 34 | J.D. Leckenby | P | NCAA | 6-4 | 208 | Right | Right | 1992 | 19 | Buhl,Idaho | | UDFA | | |
| 32 | Jason Monda | CF | NCAA | 6-4 | 190 | Left | Left | 8/22/1991 | 19 | Olympia,Washington | 2010 | 32 | 980 | COL |
| 37 | Adam Nelubowich | 3B | NCAA | 6-2 | 185 | Left | Right | 4/28/1991 | 20 | Edmonton,Alberta | 2009 | 14 | 413 | SEA |
| 45 | Richie Ochoa | P | NCAA | 6-2 | 238 | Left | Left | 1991 | 20 | Friday Harbor,Washington | | UDFA | | |
| 26 | Stetson Olson | IF | NCAA | 6-0 | 210 | Both | Right | 1992 | 19 | Renton,Washington | | UDFA | | |
| 30 | Jay Ponciano | C | NCAA | 5-9 | 187 | Left | Right | 1990 | 21 | Vancouver,Washington | | UDFA | | |
| 6 | Tommy Richards | 2B | RK | 5-11 | 175 | Right | Right | 4/27/1990 | 21 | Toronto,Ontario | 2012 | 24 | 732 | BAL |
| 21 | Paris Shewey | P | RK | 6-0 | 200 | Left | Left | 2/5/1989 | 22 | Bellevue,Washington | | UDFA | | |
| 28 | Collin Slaybaugh | C | NCAA | 6-1 | 185 | Left | Right | 1992 | 19 | Puyallup,Washington | | UDFA | | |
| 16 | Brandon Snyder | P | NCAA | 6-0 | 200 | Left | Left | 4/13/1992 | 19 | Tualatin,Oregon | | UDFA | | |
| 5 | Trace Tam Sing | 2B | NCAA | 6-0 | 175 | Right | Right | 12/7/1991 | 19 | Seattle,Washington | 2010 | 22 | 683 | BOS |
| 19 | Bob Williams | C | NCAA | 6-2 | 195 | Right | Right | 1948 | 63 | Kirkland,Washington | 1969 | 4 | 79 | OAK |
| 9 | Taylor Williams | P | NCAA | 5-11 | 185 | Right | Right | 7/21/1991 | 19 | Camas,Washington | | UDFA | | |
| 12 | James Wise | P | NCAA | 6-1 | 161 | Right | Right | 12/13/1988 | 22 | Boise,Idaho | | UDFA | | |