| 48 | Dixon Anderson | P | A | 6-5 | 225 | Right | Right | 7/2/1989 | 21 | Berkeley,California | 2011 | 9 | 277 | WAN |
|
| 1 | Austin Booker | LF | A- | 5-10 | 165 | Left | Right | 4/11/1988 | 23 | Pasadena,California | 2011 | 33 | 1006 | OAK |
| 22 | Vince Bruno | OF | NCAA | 5-10 | 170 | Left | Right | 5/30/1991 | 20 | Concord,California | | UDFA | | |
| 45 | Chad Bunting | C | Ind | 6-1 | 175 | Right | Right | 10/23/1989 | 21 | Woodland,California | | UDFA | | |
| 31 | David Buscovich | 1B-OF | NCAA | 5-10 | 206 | Left | Left | 8/1/1989 | 21 | Silver Spring,Maryland | | UDFA | | |
| 5 | Derek Campbell | IF | NCAA | 6-0 | 172 | Right | Right | 6/28/1991 | 20 | Irvine,California | | UDFA | | |
| 44 | Mitch Delfino | 3B | A | 6-3 | 185 | Right | Right | 1/13/1991 | 20 | Santa Rosa,California | 2012 | 20 | 628 | SF |
| 43 | Joey Donofrio | P | A | 6-3 | 180 | Right | Right | 5/10/1989 | 22 | Baltimore,Maryland | 2012 | 31 | 960 | STL |
| 9 | Alex Egber | C | NCAA | 6-1 | 195 | Right | Right | 2/13/1992 | 19 | Silver Spring,Maryland | | UDFA | | |
| 49 | Matt Flemer | P | A- | 6-2 | 205 | Right | Right | 11/22/1990 | 20 | El Cerrito,California | 2012 | 27 | 828 | COL |
| 35 | Erik Johnson | P | AA | 6-3 | 210 | Right | Right | 12/30/1989 | 21 | Mountain View,California | 2011 | 2 | 80 | CHW |
| 23 | Justin Jones | P | NCAA | 6-3 | 175 | Left | Left | 1/10/1991 | 20 | Modesto,California | 2012 | 26 | 790 | MIN |
| 6 | Andrew Knapp | C | NCAA | 6-1 | 175 | Both | Right | 11/9/1991 | 19 | Granite Bay,California | 2010 | 41 | 1235 | OAK |
| 27 | Chadd Krist | C | A | 5-10 | 187 | Right | Right | 1/28/1990 | 21 | Santa Rosa,California | 2012 | 9 | 284 | CHC |
| 25 | Louie Lechich | P | NCAA | 6-4 | 200 | Left | Left | 11/19/1991 | 19 | Stockton,California | 2010 | 42 | 1265 | OAK |
| 2 | Darrel Matthews | OF | NCAA | 5-10 | 165 | Left | Left | 10/25/1990 | 20 | Kansas City,Missouri | | UDFA | | |
| 41 | Kevin Miller | P | NCAA | 5-10 | 185 | Right | Right | 8/25/1989 | 21 | San Jose,California | 2011 | 18 | 550 | HOU |
| 19 | Danny Oh | RF-LF | A | 5-11 | 170 | Left | Left | 12/28/1989 | 21 | Seattle,Washington | 2012 | 27 | 847 | NYY |
| 16 | Kyle Porter | P | NCAA | 6-2 | 192 | Left | Left | 6/1/1992 | 19 | Los Gatos,California | | UDFA | | |
| 14 | Tony Renda | 2B | A | 5-10 | 170 | Right | Right | 1/24/1991 | 20 | Santa Rosa,California | 2012 | 2 | 80 | WAN |
| 33 | Devon Rodriguez | OF-IF | NCAA | 6-2 | 180 | Left | Right | 10/13/1991 | 19 | Santa Clarita,California | | UDFA | | |
| 36 | Ryan Sandler | P | NCAA | 6-2 | 210 | Right | Right | 8/26/1991 | 19 | Solana Beach,California | | UDFA | | |
| 20 | Logan Scott | P | NCAA | 6-2 | 210 | Right | Right | 3/16/1990 | 21 | San Mateo,California | | UDFA | | |
| 15 | Marcus Semien | SS | AA | 6-0 | 175 | Right | Right | 9/17/1990 | 20 | El Cerrito,California | 2011 | 6 | 201 | CHW |
| 11 | Dwight Tanaka | IF | NCAA | 5-8 | 170 | Right | Right | 11/15/1988 | 22 | Berkeley,California | | UDFA | | |
| - | Michael Theofanopoulos | OF-P | NCAA | 5-10 | 191 | Left | Left | 8/5/1992 | 18 | Pleasanton,California | | UDFA | | |
| 30 | Paul Toboni | IF | NCAA | 6-2 | 185 | Right | Right | 2/8/1990 | 21 | San Francisco,California | | UDFA | | |
| 51 | Jake Wark | 1B | NCAA | 6-4 | 230 | Left | Right | 2/7/1992 | 19 | Beaverton,Oregon | 2010 | 38 | 1154 | ATL |