| 2012-06-10 |
| 2012-08-03 | OAK | 31.333 | L 5-4 | vs TOR | 1 | 157 | - | Rel | 1.1 | 0 | 0 | 0 | 0 | 0 | 3 | 16 | 4 | 12 | 75% | 0-0 | 0.00 | 0.00 |
| 2012-08-04 Traded from Orioles to Athletics for future considerations |
| 2012-08-04 Contract purchased from minors |
| 2012-08-04 | OAK | 31.334 | W 1-3 | vs TOR | 2 | 158 | - | Rel | 1.2 | 0 | 0 | 0 | 0 | 1 | 1 | 27 | 11 | 16 | 59% | 0-0 | 0.00 | 0.33 |
| 2012-08-06 | OAK | 31.336 | W 0-4 | vs ANA | 3 | 159 | - | Rel | 0.1 | 0 | 0 | 0 | 0 | 0 | 1 | 7 | 2 | 5 | 71% | 0-0 | 0.00 | 0.33 |
| 2012-08-08 | OAK | 31.338 | L 9-8 | vs ANA | 4 | 160 | W | Rel | 0.1 | 0 | 0 | 0 | 0 | 0 | 1 | 7 | 2 | 5 | 71% | 1-0 | 0.00 | 0.25 |
| 2012-08-10 | OAK | 31.340 | L 3-4 | @ CHA | 5 | 161 | L | Rel | 0.2 | 1 | 1 | 1 | 1 | 0 | 1 | 10 | 3 | 7 | 70% | 1-1 | 2.25 | 0.50 |
| 2012-08-15 | OAK | 31.345 | L 2-3 | @ KCA | 6 | 162 | - | Rel | 1.0 | 1 | 0 | 0 | 0 | 1 | 0 | 22 | 7 | 15 | 68% | 1-1 | 1.80 | 0.80 |
| 2012-08-17 | OAK | 31.347 | L 6-4 | vs CLE | 7 | 163 | - | Rel | 1.1 | 0 | 0 | 0 | 0 | 0 | 2 | 16 | 4 | 12 | 75% | 1-1 | 1.29 | 0.57 |
| 2012-08-23 | OAK | 31.353 | L 0-5 | @ TBA | 8 | 164 | - | Rel | 1.0 | 0 | 0 | 0 | 0 | 1 | 1 | 18 | 7 | 11 | 61% | 1-1 | 1.13 | 0.63 |
| 2012-08-28 | OAK | 31.358 | W 7-0 | @ CLE | 9 | 165 | - | Rel | 0.1 | 0 | 0 | 0 | 0 | 0 | 0 | 6 | 3 | 3 | 50% | 1-1 | 1.13 | 0.63 |
| 2012-08-29 | OAK | 31.359 | W 8-4 | @ CLE | 10 | 166 | - | Rel | 0.1 | 2 | 0 | 0 | 0 | 0 | 1 | 12 | 1 | 11 | 92% | 1-1 | 1.13 | 0.88 |
| 2012-09-01 | OAK | 31.362 | L 7-1 | vs BOS | 11 | 167 | - | Rel | 2.0 | 1 | 0 | 0 | 0 | 0 | 2 | 26 | 7 | 19 | 73% | 1-1 | 0.90 | 0.80 |
| 2012-09-03 | OAK | 31.364 | W 3-8 | vs ANA | 12 | 168 | - | Rel | 1.2 | 1 | 0 | 0 | 0 | 0 | 1 | 24 | 7 | 17 | 71% | 1-1 | 0.75 | 0.75 |
| 2012-09-05 | OAK | 32.001 | W 1-7 | vs ANA | 13 | 169 | - | Rel | 0.1 | 0 | 0 | 0 | 0 | 0 | 0 | 6 | 2 | 4 | 67% | 1-1 | 0.75 | 0.75 |
| 2012-09-08 | OAK | 32.004 | W 6-1 | @ SEA | 14 | 170 | - | Rel | 0.2 | 0 | 0 | 0 | 0 | 1 | 0 | 15 | 7 | 8 | 53% | 1-1 | 0.69 | 0.77 |
| 2012-09-09 | OAK | 32.005 | W 4-2 | @ SEA | 15 | 171 | - | Rel | 0.2 | 0 | 0 | 0 | 0 | 0 | 0 | 12 | 3 | 9 | 75% | 1-1 | 0.64 | 0.71 |
| 2012-09-11 | OAK | 32.007 | W 6-5 | @ ANA | 16 | 172 | - | Rel | 0.0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 1 | 50% | 1-1 | 0.64 | 0.71 |
| 2012-09-14 | OAK | 32.010 | L 3-2 | vs BAL | 17 | 173 | - | Rel | 0.2 | 0 | 0 | 0 | 0 | 1 | 0 | 10 | 6 | 4 | 40% | 1-1 | 0.64 | 0.79 |
| 2012-09-19 | OAK | 32.015 | L 2-6 | @ DET | 18 | 174 | - | Rel | 1.2 | 2 | 0 | 0 | 0 | 0 | 2 | 34 | 10 | 24 | 71% | 1-1 | 0.56 | 0.81 |
| 2012-09-20 | OAK | 32.016 | W 12-4 | @ DET | 19 | 175 | W | Rel | 0.1 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 1 | 50% | 2-1 | 0.56 | 0.81 |
| 2012-09-22 | OAK | 32.018 | L 9-10 | @ NYA | 20 | 176 | - | Rel | 1.0 | 1 | 1 | 1 | 1 | 0 | 0 | 22 | 7 | 15 | 68% | 2-1 | 1.06 | 0.82 |
| 2012-09-24 | OAK | 32.020 | L 4-5 | @ TEX | 21 | 177 | - | Rel | 0.1 | 1 | 1 | 1 | 1 | 0 | 0 | 6 | 1 | 5 | 83% | 2-1 | 1.50 | 0.83 |
| 2012-09-27 | OAK | 32.023 | L 7-9 | @ TEX | 22 | 178 | - | Rel | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 | 17 | 5 | 12 | 71% | 2-1 | 1.42 | 0.79 |
| 2012-09-29 | OAK | 32.025 | L 7-4 | vs SEA | 23 | 179 | - | Rel | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 | 17 | 7 | 10 | 59% | 2-1 | 1.35 | 0.75 |
| 2012-09-30 | OAK | 32.026 | L 5-2 | vs SEA | 24 | 180 | - | Rel | 0.0 | 0 | 0 | 0 | 0 | 1 | 0 | 4 | 4 | 0 | 0% | 2-1 | 1.35 | 0.80 |