| 2012-06-04 Released by Reds |
| 2012-06-08 Signed 1-year contract |
| 2012-06-09 Recalled from Colorado Springs (AAA) |
| 2012-06-09 | COL | 31.152 | W 5-11 | vs ANA | 1 | 182 | L | ST | 3.1 | 10 | 8 | 8 | 0 | 1 | 1 | 74 | 24 | 50 | 68% | 0-1 | 24.00 | 3.67 |
| 2012-06-15 | COL | 31.158 | W 12-4 | @ DET | 2 | 183 | - | ST | 5.1 | 8 | 4 | 4 | 0 | 3 | 2 | 93 | 39 | 54 | 58% | 0-1 | 12.00 | 2.44 |
| 2012-06-21 | COL | 31.164 | W 4-1 | @ PHI | 3 | 184 | - | ST | 5.0 | 6 | 1 | 1 | 1 | 0 | 3 | 76 | 28 | 48 | 63% | 0-1 | 8.36 | 2.00 |
| 2012-06-25 | COL | 31.168 | L 4-2 | vs WAS | 4 | 185 | - | ST | 5.0 | 5 | 2 | 2 | 0 | 0 | 5 | 66 | 18 | 48 | 73% | 0-1 | 7.11 | 1.74 |
| 2012-06-29 | COL | 31.172 | L 10-2 | vs SDN | 5 | 186 | W | ST | 6.0 | 3 | 0 | 0 | 0 | 1 | 1 | 82 | 33 | 49 | 60% | 1-1 | 5.40 | 1.48 |
| 2012-07-03 | COL | 31.176 | W 3-2 | @ SLN | 6 | 187 | W | ST | 5.0 | 5 | 2 | 2 | 1 | 1 | 2 | 76 | 28 | 48 | 63% | 2-1 | 5.10 | 1.43 |
| 2012-07-07 | COL | 31.180 | L 1-4 | @ WAS | 7 | 188 | L | ST | 5.0 | 6 | 3 | 3 | 1 | 1 | 5 | 76 | 28 | 48 | 63% | 2-2 | 5.14 | 1.43 |
| 2012-07-16 | COL | 31.189 | L 5-4 | vs PIT | 8 | 189 | - | ST | 5.0 | 6 | 1 | 1 | 0 | 0 | 1 | 71 | 30 | 41 | 58% | 2-2 | 4.73 | 1.40 |
| 2012-07-21 | COL | 31.194 | W 8-6 | @ SDN | 9 | 190 | - | ST | 5.0 | 8 | 5 | 5 | 1 | 0 | 5 | 79 | 26 | 53 | 67% | 2-2 | 5.20 | 1.42 |
| 2012-07-25 | COL | 31.198 | W 4-2 | @ ARI | 10 | 191 | W | ST | 6.0 | 5 | 2 | 2 | 2 | 1 | 4 | 97 | 33 | 64 | 66% | 3-2 | 4.94 | 1.37 |
| 2012-07-31 | COL | 31.204 | W 6-11 | vs SLN | 11 | 192 | L | ST | 4.0 | 6 | 5 | 5 | 1 | 0 | 2 | 56 | 18 | 38 | 68% | 3-3 | 5.40 | 1.38 |
| 2012-08-04 | COL | 31.208 | W 6-11 | vs SFN | 12 | 193 | L | ST | 3.2 | 9 | 6 | 6 | 2 | 2 | 3 | 66 | 25 | 41 | 62% | 3-4 | 6.05 | 1.50 |
| 2012-08-08 | COL | 31.212 | L 4-6 | @ LAN | 13 | 194 | - | ST | 4.0 | 4 | 3 | 3 | 1 | 2 | 2 | 73 | 32 | 41 | 56% | 3-4 | 6.10 | 1.50 |
| 2012-08-13 | COL | 31.217 | L 9-6 | vs MIL | 14 | 195 | W | ST | 5.1 | 6 | 3 | 3 | 1 | 2 | 2 | 75 | 32 | 43 | 57% | 4-4 | 5.96 | 1.49 |
| 2012-08-17 | COL | 31.221 | W 5-6 | vs MIA | 15 | 196 | - | ST | 5.0 | 5 | 4 | 4 | 1 | 1 | 3 | 69 | 28 | 41 | 59% | 4-4 | 6.04 | 1.47 |
| 2012-08-22 | COL | 31.226 | W 5-2 | @ NYN | 16 | 197 | - | ST | 5.0 | 5 | 1 | 1 | 0 | 2 | 4 | 82 | 36 | 46 | 56% | 4-4 | 5.77 | 1.46 |
| 2012-08-27 | COL | 31.231 | L 10-0 | vs LAN | 17 | 198 | W | ST | 5.0 | 3 | 0 | 0 | 0 | 1 | 6 | 89 | 35 | 54 | 61% | 5-4 | 5.42 | 1.42 |
| 2012-09-02 | COL | 31.237 | L 11-10 | vs SDN | 18 | 199 | - | ST | 3.2 | 10 | 6 | 5 | 1 | 0 | 4 | 80 | 25 | 55 | 69% | 5-4 | 5.76 | 1.49 |
| 2012-09-07 | COL | 31.242 | L 2-3 | @ PHI | 19 | 200 | - | ST | 5.2 | 6 | 0 | 0 | 0 | 1 | 7 | 85 | 27 | 58 | 68% | 5-4 | 5.38 | 1.47 |
| 2012-09-12 | COL | 31.247 | W 3-8 | vs SFN | 20 | 201 | L | ST | 3.0 | 7 | 5 | 5 | 0 | 0 | 5 | 77 | 27 | 50 | 65% | 5-5 | 5.68 | 1.49 |
| 2012-09-18 | COL | 31.253 | L 3-6 | @ SFN | 21 | 202 | L | ST | 5.0 | 6 | 2 | 2 | 0 | 1 | 3 | 78 | 25 | 53 | 68% | 5-6 | 5.58 | 1.49 |
| 2012-09-23 | COL | 31.258 | W 7-10 | vs ARI | 22 | 203 | - | ST | 4.0 | 5 | 2 | 2 | 0 | 0 | 0 | 75 | 30 | 45 | 60% | 5-6 | 5.54 | 1.48 |
| 2012-09-28 | COL | 31.263 | L 0-8 | @ LAN | 23 | 204 | L | ST | 4.0 | 6 | 5 | 5 | 1 | 1 | 3 | 66 | 28 | 38 | 58% | 5-7 | 5.75 | 1.49 |
| 2012-10-03 | COL | 31.268 | W 2-1 | @ ARI | 24 | 205 | W | ST | 5.0 | 5 | 1 | 1 | 1 | 1 | 3 | 94 | 37 | 57 | 61% | 6-7 | 5.58 | 1.48 |