| 2012-04-06 | COL | 32.364 | W 5-3 | @ HOU | 1 | 178 | W | ST | 7.0 | 4 | 3 | 3 | 2 | 3 | 1 | 103 | 39 | 64 | 62% | 1-0 | 3.86 | 1.00 |
| 2012-04-11 | COL | 33.003 | L 17-8 | vs SFN | 2 | 179 | - | ST | 3.1 | 9 | 6 | 6 | 2 | 2 | 1 | 80 | 31 | 49 | 61% | 1-0 | 8.10 | 1.80 |
| 2012-04-16 | COL | 33.008 | W 1-7 | vs SDN | 3 | 180 | L | ST | 7.0 | 9 | 6 | 6 | 0 | 2 | 1 | 100 | 37 | 63 | 63% | 1-1 | 7.94 | 1.71 |
| 2012-04-22 | COL | 33.014 | W 4-1 | @ MIL | 4 | 181 | W | ST | 7.0 | 3 | 1 | 1 | 0 | 3 | 2 | 101 | 46 | 55 | 54% | 2-1 | 6.00 | 1.46 |
| 2012-05-06 |
| 2012-05-15 Activated from DL |
| 2012-05-15 | COL | 33.037 | W 5-4 | @ SFN | 5 | 182 | - | ST | 5.1 | 4 | 1 | 0 | 0 | 4 | 4 | 93 | 43 | 50 | 54% | 2-1 | 4.80 | 1.43 |
| 2012-05-20 | COL | 33.042 | W 4-6 | vs SEA | 6 | 183 | L | ST | 6.0 | 7 | 6 | 6 | 3 | 2 | 4 | 101 | 45 | 56 | 55% | 2-2 | 5.50 | 1.44 |
| 2012-05-26 | COL | 33.048 | L 3-10 | @ CIN | 7 | 184 | L | ST | 5.0 | 10 | 6 | 2 | 2 | 1 | 5 | 104 | 37 | 67 | 64% | 2-3 | 5.27 | 1.54 |
| 2012-05-31 | COL | 33.053 | L 11-5 | vs HOU | 8 | 185 | W | ST | 7.0 | 12 | 5 | 5 | 1 | 0 | 1 | 99 | 37 | 62 | 63% | 3-3 | 5.44 | 1.56 |
| 2012-06-05 | COL | 33.058 | L 0-10 | @ ARI | 9 | 186 | L | ST | 3.1 | 11 | 7 | 7 | 2 | 2 | 4 | 90 | 39 | 51 | 57% | 3-4 | 6.35 | 1.73 |
| 2012-06-12 | COL | 33.065 | W 5-8 | vs OAK | 10 | 187 | L | ST | 5.0 | 8 | 7 | 7 | 3 | 2 | 5 | 102 | 36 | 66 | 65% | 3-5 | 6.91 | 1.75 |
| 2012-06-17 | COL | 33.070 | L 0-5 | @ DET | 11 | 188 | L | ST | 3.0 | 8 | 4 | 3 | 0 | 2 | 2 | 80 | 28 | 52 | 65% | 3-6 | 7.02 | 1.83 |
| 2012-06-20 | COL | 33.073 | L 6-7 | @ PHI | 12 | 189 | - | Rel | 3.0 | 0 | 0 | 0 | 0 | 0 | 2 | 40 | 14 | 26 | 65% | 3-6 | 6.68 | 1.74 |
| 2012-06-24 | COL | 33.077 | L 2-4 | @ TEX | 13 | 190 | - | Rel | 3.1 | 3 | 0 | 0 | 0 | 2 | 2 | 52 | 25 | 27 | 52% | 3-6 | 6.37 | 1.74 |
| 2012-06-27 | COL | 33.080 | W 5-11 | vs WAS | 14 | 191 | - | Rel | 4.0 | 6 | 3 | 3 | 0 | 1 | 2 | 60 | 21 | 39 | 65% | 3-6 | 6.39 | 1.74 |
| 2012-06-30 | COL | 33.083 | W 4-8 | vs SDN | 15 | 192 | L | Rel | 2.0 | 3 | 3 | 3 | 2 | 0 | 0 | 29 | 10 | 19 | 66% | 3-7 | 6.59 | 1.73 |
| 2012-07-04 | COL | 33.087 | L 1-4 | @ SLN | 16 | 193 | L | ST | 6.0 | 6 | 2 | 2 | 0 | 1 | 2 | 84 | 37 | 47 | 56% | 3-8 | 6.31 | 1.69 |
| 2012-07-08 | COL | 33.091 | W 4-3 | @ WAS | 17 | 194 | - | ST | 6.0 | 6 | 2 | 2 | 1 | 1 | 3 | 87 | 31 | 56 | 64% | 3-8 | 6.07 | 1.65 |
| 2012-07-14 | COL | 33.097 | W 5-8 | vs PHI | 18 | 195 | L | ST | 4.2 | 7 | 4 | 4 | 1 | 2 | 3 | 76 | 31 | 45 | 59% | 3-9 | 6.14 | 1.66 |
| 2012-07-18 | COL | 33.101 | W 6-9 | vs PIT | 19 | 196 | - | ST | 2.2 | 6 | 6 | 4 | 2 | 1 | 1 | 67 | 22 | 45 | 67% | 3-9 | 6.33 | 1.68 |
| 2012-07-20 Traded from Rockies to Royals for Jonathan Sanchez |
| 2012-07-22 | KCA | 33.105 | W 5-7 | vs MIN | 20 | 197 | L | ST | 5.0 | 4 | 5 | 5 | 1 | 3 | 4 | 91 | 35 | 56 | 62% | 3-10 | 6.47 | 1.67 |
| 2012-07-27 | KCA | 33.110 | L 1-6 | @ SEA | 21 | 198 | L | ST | 5.1 | 11 | 6 | 6 | 2 | 0 | 4 | 105 | 37 | 68 | 65% | 3-11 | 6.68 | 1.69 |
| 2012-08-03 | KCA | 33.117 | W 3-5 | vs TEX | 22 | 199 | L | ST | 6.0 | 6 | 3 | 3 | 0 | 2 | 4 | 100 | 36 | 64 | 64% | 3-12 | 6.56 | 1.67 |
| 2012-08-08 | KCA | 33.122 | W 2-1 | @ CHA | 23 | 200 | W | ST | 8.0 | 5 | 0 | 0 | 0 | 0 | 6 | 107 | 31 | 76 | 71% | 4-12 | 6.10 | 1.60 |
| 2012-08-14 | KCA | 33.128 | L 5-0 | vs OAK | 24 | 201 | W | ST | 7.0 | 3 | 0 | 0 | 0 | 2 | 8 | 102 | 39 | 63 | 62% | 5-12 | 5.75 | 1.55 |
| 2012-08-19 | KCA | 33.133 | L 5-2 | vs CHA | 25 | 202 | - | ST | 7.2 | 2 | 2 | 0 | 0 | 1 | 5 | 101 | 33 | 68 | 67% | 5-12 | 5.40 | 1.48 |
| 2012-08-25 | KCA | 33.139 | W 10-9 | @ BOS | 26 | 203 | - | ST | 2.2 | 7 | 7 | 6 | 2 | 2 | 1 | 51 | 21 | 30 | 59% | 5-12 | 5.73 | 1.52 |
| 2012-08-30 | KCA | 33.144 | L 2-1 | vs DET | 27 | 204 | W | ST | 7.1 | 10 | 1 | 1 | 0 | 0 | 3 | 99 | 30 | 69 | 70% | 6-12 | 5.46 | 1.51 |
| 2012-09-04 | KCA | 33.149 | L 6-3 | vs TEX | 28 | 205 | W | ST | 7.0 | 5 | 2 | 2 | 1 | 2 | 5 | 102 | 38 | 64 | 63% | 7-12 | 5.33 | 1.48 |
| 2012-09-09 | KCA | 33.154 | W 2-1 | @ CHA | 29 | 206 | - | ST | 8.0 | 6 | 0 | 0 | 0 | 0 | 4 | 101 | 31 | 70 | 69% | 7-12 | 5.05 | 1.45 |
| 2012-09-15 | KCA | 33.160 | L 3-2 | vs ANA | 30 | 207 | - | ST | 8.0 | 5 | 2 | 2 | 1 | 1 | 2 | 106 | 36 | 70 | 66% | 7-12 | 4.91 | 1.41 |
| 2012-09-20 | KCA | 33.165 | L 4-3 | vs CHA | 31 | 208 | - | ST | 6.0 | 8 | 3 | 1 | 0 | 1 | 4 | 106 | 37 | 69 | 65% | 7-12 | 4.79 | 1.41 |
| 2012-09-26 | KCA | 33.171 | L 4-5 | @ DET | 32 | 209 | - | ST | 7.0 | 7 | 4 | 4 | 2 | 2 | 3 | 100 | 37 | 63 | 63% | 7-12 | 4.81 | 1.41 |
| 2012-10-02 | KCA | 33.177 | L 4-2 | vs DET | 33 | 210 | W | ST | 6.0 | 5 | 2 | 2 | 0 | 3 | 3 | 100 | 39 | 61 | 61% | 8-12 | 4.75 | 1.41 |