| Roster | ||||||||
| No | STARTERS | AGE | B | T | HT | WT | DOB | 2012 SALARY |
| 34 | Arrieta, Jake | 26 | R | R | 6-4 | 225 | 03/06/1986 | $488,500 |
| 53 | Britton, Zach (DL) | 24 | L | L | 6-3 | 195 | 12/22/1987 | $486,000 |
| 16 | Chen, Wei-Yin | 26 | L | L | 6-0 | 195 | 07/21/1985 | $3,072,000 |
| 37 | Eveland, Dana | 28 | L | L | 6-1 | 235 | 10/29/1983 | Not available |
| 39 | Hammel, Jason | 29 | R | R | 6-6 | 215 | 09/02/1982 | $4,750,000 |
| 29 | Hunter, Tommy | 25 | R | R | 6-3 | 248 | 07/03/1986 | $493,500 |
| 17 | Matusz, Brian | 25 | L | L | 6-5 | 190 | 02/11/1987 | $1,450,000 |
| 18 | Wada, Tsuyoshi (DL) | 31 | 5-11 | 180 | 02/21/1981 | $4,075,000 | ||
| No | BULLPEN | AGE | B | T | HT | WT | DOB | 2012 SALARY |
| 38 | Ayala, Luis | 34 | R | R | 6-2 | 175 | 01/12/1978 | $825,000 |
| 63 | Gregg, Kevin | 33 | R | R | 6-6 | 230 | 06/20/1978 | $5,200,000 |
| 43 | Johnson, Jim | 28 | R | R | 6-5 | 230 | 06/27/1983 | $2,625,000 |
| 27 | Lindstrom, Matt (DL) | 32 | R | R | 6-3 | 220 | 02/11/1980 | $3,600,000 |
| 56 | O'Day, Darren | 29 | R | R | 6-4 | 220 | 10/22/1982 | $1,350,000 |
| 40 | Patton, Troy | 26 | S | L | 6-1 | 185 | 09/03/1985 | $483,500 |
| 55 | Pomeranz, Stu | 27 | R | R | 6-7 | 220 | 12/17/1984 | Not available |
| 47 | Strop, Pedro | 26 | R | R | 6-0 | 175 | 06/13/1985 | $482,500 |
| No | CATCHERS | AGE | B | T | HT | WT | DOB | 2012 SALARY |
| 28 | Paulino, Ronny | 31 | R | R | 6-3 | 245 | 04/21/1981 | $1,000,000 |
| 31 | Teagarden, Taylor (DL) | 28 | R | R | 6-1 | 200 | 12/21/1983 | $489,500 |
| 32 | Wieters, Matt | 26 | S | R | 6-5 | 230 | 05/21/1986 | $500,000 |
| No | INFIELDERS | AGE | B | T | HT | WT | DOB | 2012 SALARY |
| 11 | Andino, Robert | 28 | R | R | 6-0 | 195 | 04/25/1984 | $1,300,000 |
| 24 | Betemit, Wilson | 30 | S | R | 6-2 | 220 | 11/02/1981 | $1,250,000 |
| 19 | Davis, Chris | 26 | L | R | 6-3 | 232 | 03/17/1986 | $488,000 |
| 3 | Flaherty, Ryan | 25 | L | R | 6-3 | 220 | 07/27/1986 | $480,000 |
| 2 | Hardy, J.J. | 29 | R | R | 6-1 | 200 | 08/19/1982 | $7,416,666 |
| 12 | Reynolds, Mark (DL) | 28 | R | R | 6-2 | 220 | 08/03/1983 | $7,833,333 |
| 1 | Roberts, Brian (DL) | 34 | S | R | 5-9 | 175 | 10/09/1977 | $10,000,000 |
| 6 | Tolleson, Steve | 28 | R | R | 5-11 | 190 | 11/01/1983 | Not available |
| No | OUTFIELDERS | AGE | B | T | HT | WT | DOB | 2012 SALARY |
| 13 | Avery, Xavier | 22 | L | L | 6-0 | 190 | 01/01/1990 | Not available |
| 9 | Chavez, Endy (DL) | 34 | L | L | 6-0 | 170 | 02/07/1978 | $1,500,000 |
| 10 | Jones, Adam | 26 | R | R | 6-2 | 215 | 08/01/1985 | $6,150,000 |
| 21 | Markakis, Nick | 28 | L | L | 6-2 | 200 | 11/17/1983 | $12,350,000 |
| 14 | Reimold, Nolan (DL) | 28 | R | R | 6-4 | 205 | 10/12/1983 | $490,500 |
| No | DESIGNATED HITTERS | AGE | B | T | HT | WT | DOB | 2012 SALARY |
| 36 | Johnson, Nick | 33 | L | L | 6-3 | 195 | 09/19/1978 | $800,000 |
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