| West | W | L | Pct | GB |
| Texas | 93 | 69 | .574 | -- |
| LA Angels | 89 | 73 | .549 | 4.0 |
| Oakland | 64 | 68 | .485 | 15.0 |
| Seattle | 75 | 87 | .463 | 18.0 |
| Date | Pitcher | Hand | Age | Game Result | Opp | GS# | Career | Dec | IP | H | R | ER | HR | BB | SO | Pit | Bal | Str | Str% | W-L | ERA | WHIP |
| 2012-04-06 | Jered Weaver | R | 30 | L 5-0 | vs KCA | 1 | 178 | W | 8.0 | 4 | 0 | 0 | 0 | 0 | 10 | 97 | 35 | 62 | 64% | 1-0 | 0.00 | 0.50 |
| 2012-04-07 | Dan Haren | R | 32 | W 3-6 | vs KCA | 1 | 257 | L | 5.1 | 11 | 5 | 5 | 2 | 1 | 5 | 90 | 32 | 58 | 64% | 0-1 | 9.00 | 2.40 |
| 2012-04-08 | Ervin Santana | R | 29 | W 3-7 | vs KCA | 1 | 204 | L | 5.2 | 7 | 6 | 5 | 2 | 2 | 2 | 96 | 43 | 53 | 55% | 0-1 | 7.50 | 1.50 |
| 2012-04-09 | C.J. Wilson | L | 31 | W 5-1 | @ MIN | 1 | 74 | W | 7.0 | 3 | 1 | 1 | 1 | 4 | 5 | 103 | 43 | 60 | 58% | 1-0 | 1.29 | 1.00 |
| 2012-04-11 | Jered Weaver | R | 30 | L 5-6 | @ MIN | 2 | 179 | - | 6.0 | 7 | 5 | 5 | 1 | 1 | 7 | 110 | 40 | 70 | 64% | 1-0 | 3.21 | 0.86 |
| 2012-04-12 | Dan Haren | R | 32 | L 9-10 | @ MIN | 2 | 258 | - | 5.0 | 9 | 3 | 3 | 1 | 1 | 7 | 97 | 30 | 67 | 69% | 0-1 | 7.20 | 2.20 |
| 2012-04-13 | Ervin Santana | R | 29 | L 0-5 | @ NYA | 2 | 205 | L | 6.0 | 6 | 5 | 5 | 2 | 3 | 5 | 111 | 54 | 57 | 51% | 0-2 | 7.50 | 1.50 |
| 2012-04-14 | C.J. Wilson | L | 31 | W 7-1 | @ NYA | 2 | 75 | W | 6.0 | 6 | 1 | 1 | 0 | 2 | 2 | 105 | 42 | 63 | 60% | 2-0 | 1.38 | 1.15 |
| 2012-04-15 | Jerome Williams | R | 30 | L 5-11 | @ NYA | 1 | 78 | L | 2.2 | 5 | 5 | 5 | 0 | 3 | 1 | 44 | 19 | 25 | 57% | 0-1 | 15.00 | 2.67 |
| 2012-04-16 | Jered Weaver | R | 30 | L 6-0 | vs OAK | 3 | 180 | W | 6.2 | 5 | 0 | 0 | 0 | 1 | 6 | 104 | 42 | 62 | 60% | 2-0 | 2.14 | 0.86 |
| 2012-04-17 | Dan Haren | R | 32 | W 3-5 | vs OAK | 3 | 259 | - | 6.2 | 5 | 1 | 1 | 1 | 0 | 2 | 85 | 22 | 63 | 74% | 0-1 | 4.76 | 1.59 |
| 2012-04-18 | Ervin Santana | R | 29 | W 0-6 | vs OAK | 3 | 206 | L | 7.0 | 7 | 4 | 4 | 2 | 2 | 5 | 104 | 36 | 68 | 65% | 0-3 | 6.63 | 1.42 |
| 2012-04-19 | C.J. Wilson | L | 31 | W 2-4 | vs OAK | 3 | 76 | L | 6.0 | 2 | 4 | 3 | 0 | 3 | 8 | 108 | 40 | 68 | 63% | 2-1 | 2.37 | 1.05 |
| 2012-04-20 | Jerome Williams | R | 30 | L 6-3 | vs BAL | 2 | 79 | W | 6.2 | 7 | 3 | 3 | 1 | 1 | 6 | 102 | 35 | 67 | 66% | 1-1 | 8.00 | 1.78 |
| 2012-04-21 | Jered Weaver | R | 30 | L 6-3 | vs BAL | 4 | 181 | W | 9.0 | 5 | 3 | 3 | 1 | 0 | 5 | 113 | 38 | 75 | 66% | 3-0 | 2.40 | 0.77 |
| 2012-04-22 | Dan Haren | R | 32 | W 2-3 | vs BAL | 4 | 260 | - | 7.1 | 6 | 2 | 2 | 0 | 1 | 9 | 109 | 40 | 69 | 63% | 0-1 | 4.13 | 1.42 |
| 2012-04-24 | Ervin Santana | R | 29 | L 0-5 | @ TBA | 4 | 207 | L | 5.0 | 8 | 5 | 5 | 4 | 1 | 4 | 100 | 41 | 59 | 59% | 0-4 | 7.13 | 1.50 |
| 2012-04-25 | C.J. Wilson | L | 31 | L 2-3 | @ TBA | 4 | 77 | L | 7.0 | 6 | 2 | 2 | 1 | 2 | 11 | 118 | 46 | 72 | 61% | 2-2 | 2.42 | 1.08 |
| 2012-04-26 | Jerome Williams | R | 30 | L 3-4 | @ TBA | 3 | 80 | - | 7.0 | 5 | 2 | 2 | 0 | 3 | 6 | 114 | 45 | 69 | 61% | 1-1 | 5.63 | 1.50 |
| 2012-04-27 | Jered Weaver | R | 30 | L 2-3 | @ CLE | 5 | 182 | - | 6.0 | 7 | 0 | 0 | 0 | 4 | 8 | 114 | 47 | 67 | 59% | 3-0 | 2.00 | 0.94 |
| 2012-04-28 | Dan Haren | R | 32 | W 2-1 | @ CLE | 5 | 261 | W | 8.0 | 4 | 1 | 1 | 0 | 2 | 7 | 121 | 47 | 74 | 61% | 1-1 | 3.38 | 1.25 |
| 2012-04-29 | Ervin Santana | R | 29 | L 0-4 | @ CLE | 5 | 208 | L | 7.0 | 8 | 2 | 2 | 0 | 2 | 3 | 110 | 44 | 66 | 60% | 0-5 | 6.10 | 1.48 |
| 2012-04-30 | C.J. Wilson | L | 31 | L 4-3 | vs MIN | 5 | 78 | W | 7.1 | 5 | 3 | 3 | 0 | 1 | 4 | 108 | 39 | 69 | 64% | 3-2 | 2.73 | 1.03 |
| 2012-05-01 | Jerome Williams | R | 30 | L 4-0 | vs MIN | 4 | 81 | W | 9.0 | 3 | 0 | 0 | 0 | 1 | 6 | 108 | 34 | 74 | 69% | 2-1 | 3.60 | 1.12 |
| 2012-05-02 | Jered Weaver | R | 30 | L 9-0 | vs MIN | 6 | 183 | W | 9.0 | 0 | 0 | 0 | 0 | 1 | 9 | 120 | 44 | 76 | 63% | 4-0 | 1.60 | 0.78 |
| 2012-05-03 | Dan Haren | R | 32 | W 0-5 | vs TOR | 6 | 262 | L | 7.0 | 5 | 5 | 3 | 1 | 2 | 5 | 100 | 34 | 66 | 66% | 1-2 | 3.46 | 1.21 |
| 2012-05-04 | Ervin Santana | R | 29 | W 0-4 | vs TOR | 6 | 209 | L | 8.0 | 3 | 3 | 3 | 1 | 2 | 10 | 111 | 37 | 74 | 67% | 0-6 | 5.54 | 1.31 |
| 2012-05-05 | C.J. Wilson | L | 31 | L 6-2 | vs TOR | 6 | 79 | W | 8.0 | 6 | 2 | 2 | 1 | 3 | 9 | 102 | 39 | 63 | 62% | 4-2 | 2.63 | 1.05 |
| 2012-05-06 | Jerome Williams | R | 30 | L 4-3 | vs TOR | 5 | 82 | W | 6.2 | 8 | 3 | 2 | 0 | 1 | 4 | 88 | 37 | 51 | 58% | 3-1 | 3.38 | 1.16 |
| 2012-05-07 | Jered Weaver | R | 30 | W 8-3 | @ MIN | 7 | 184 | W | 6.0 | 3 | 1 | 1 | 0 | 2 | 2 | 89 | 36 | 53 | 60% | 5-0 | 1.59 | 0.78 |
| 2012-05-08 | Dan Haren | R | 32 | L 0-5 | @ MIN | 7 | 263 | L | 3.2 | 8 | 5 | 5 | 1 | 2 | 0 | 78 | 30 | 48 | 62% | 1-3 | 4.19 | 1.33 |
| 2012-05-09 | Ervin Santana | R | 29 | W 6-2 | @ MIN | 7 | 210 | W | 7.1 | 6 | 2 | 2 | 1 | 3 | 1 | 110 | 43 | 67 | 61% | 1-6 | 5.09 | 1.30 |
| 2012-05-11 | C.J. Wilson | L | 31 | L 3-10 | @ TEX | 7 | 80 | L | 0.1 | 3 | 4 | 4 | 0 | 1 | 1 | 25 | 12 | 13 | 52% | 4-3 | 3.43 | 1.12 |
| 2012-05-12 | C.J. Wilson | L | 31 | W 4-2 | @ TEX | 8 | 81 | - | 5.2 | 5 | 2 | 2 | 1 | 3 | 4 | 101 | 45 | 56 | 55% | 4-3 | 3.45 | 1.17 |
| 2012-05-13 | Jered Weaver | R | 30 | L 6-13 | @ TEX | 8 | 185 | L | 3.1 | 10 | 8 | 8 | 1 | 1 | 2 | 77 | 27 | 50 | 65% | 5-1 | 2.83 | 0.94 |
| 2012-05-14 | Dan Haren | R | 32 | W 0-5 | vs OAK | 8 | 264 | L | 6.0 | 6 | 4 | 4 | 1 | 4 | 5 | 106 | 42 | 64 | 60% | 1-4 | 4.41 | 1.37 |
| 2012-05-15 | Ervin Santana | R | 29 | L 4-0 | vs OAK | 8 | 211 | W | 7.2 | 4 | 0 | 0 | 0 | 3 | 9 | 112 | 41 | 71 | 63% | 2-6 | 4.33 | 1.24 |
| 2012-05-16 | Jerome Williams | R | 30 | L 7-2 | vs CHA | 6 | 83 | W | 8.0 | 10 | 2 | 2 | 1 | 0 | 5 | 105 | 35 | 70 | 67% | 4-1 | 3.83 | 1.28 |
| 2012-05-17 | C.J. Wilson | L | 31 | W 1-6 | vs CHA | 9 | 82 | L | 3.2 | 4 | 4 | 1 | 0 | 6 | 3 | 88 | 43 | 45 | 51% | 4-4 | 3.35 | 1.27 |
| 2012-05-18 | Jered Weaver | R | 30 | W 7-2 | @ SDN | 9 | 186 | W | 7.0 | 3 | 2 | 2 | 1 | 3 | 4 | 115 | 47 | 68 | 59% | 6-1 | 2.80 | 0.93 |
| 2012-05-19 | Dan Haren | R | 32 | L 2-3 | @ SDN | 9 | 265 | L | 6.2 | 6 | 3 | 3 | 0 | 1 | 5 | 87 | 33 | 54 | 62% | 1-5 | 4.34 | 1.32 |
| 2012-05-20 | Ervin Santana | R | 29 | L 2-3 | @ SDN | 9 | 212 | - | 6.0 | 6 | 2 | 2 | 0 | 2 | 6 | 93 | 36 | 57 | 61% | 2-6 | 4.20 | 1.25 |
| 2012-05-21 | Jerome Williams | R | 30 | L 1-2 | @ OAK | 7 | 84 | L | 6.1 | 5 | 2 | 2 | 0 | 5 | 2 | 110 | 48 | 62 | 56% | 4-2 | 3.74 | 1.32 |
| 2012-05-22 | C.J. Wilson | L | 32 | W 5-0 | @ OAK | 10 | 83 | W | 8.0 | 1 | 0 | 0 | 0 | 2 | 7 | 122 | 50 | 72 | 59% | 5-4 | 2.90 | 1.15 |
| 2012-05-23 | Jered Weaver | R | 30 | W 3-1 | @ OAK | 10 | 187 | - | 8.0 | 3 | 1 | 1 | 1 | 2 | 4 | 111 | 43 | 68 | 61% | 6-1 | 2.61 | 0.90 |
| 2012-05-24 | Dan Haren | R | 32 | W 3-0 | @ SEA | 10 | 266 | W | 9.0 | 4 | 0 | 0 | 0 | 0 | 14 | 129 | 46 | 83 | 64% | 2-5 | 3.74 | 1.20 |
| 2012-05-25 | Ervin Santana | R | 29 | W 6-4 | @ SEA | 10 | 213 | - | 5.0 | 4 | 4 | 4 | 1 | 7 | 3 | 108 | 43 | 65 | 60% | 2-6 | 4.43 | 1.32 |
| 2012-05-26 | Jerome Williams | R | 30 | W 5-3 | @ SEA | 8 | 85 | W | 6.0 | 5 | 3 | 3 | 1 | 2 | 5 | 100 | 36 | 64 | 64% | 5-2 | 3.81 | 1.31 |
| 2012-05-27 | C.J. Wilson | L | 32 | W 4-2 | @ SEA | 11 | 84 | W | 6.0 | 2 | 1 | 1 | 0 | 2 | 5 | 89 | 35 | 54 | 61% | 6-4 | 2.77 | 1.11 |
| 2012-05-28 | Jered Weaver | R | 30 | L 9-8 | vs NYA | 11 | 188 | - | 0.0 | 2 | 3 | 0 | 0 | 0 | 0 | 10 | 4 | 6 | 60% | 6-1 | 2.61 | 0.93 |
| 2012-05-29 | Dan Haren | R | 32 | L 5-1 | vs NYA | 11 | 267 | W | 7.0 | 8 | 1 | 1 | 0 | 0 | 7 | 97 | 32 | 65 | 67% | 3-5 | 3.50 | 1.19 |
| 2012-05-30 | Ervin Santana | R | 29 | W 5-6 | vs NYA | 11 | 214 | - | 5.0 | 6 | 5 | 5 | 2 | 1 | 4 | 107 | 43 | 64 | 60% | 2-6 | 4.76 | 1.33 |
| 2012-06-01 | Jerome Williams | R | 30 | L 4-2 | vs TEX | 9 | 86 | W | 7.0 | 7 | 2 | 2 | 0 | 2 | 4 | 92 | 29 | 63 | 68% | 6-2 | 3.68 | 1.30 |
| 2012-06-02 | C.J. Wilson | L | 32 | L 3-2 | vs TEX | 12 | 85 | - | 6.0 | 5 | 0 | 0 | 0 | 3 | 5 | 104 | 43 | 61 | 59% | 6-4 | 2.54 | 1.13 |
| 2012-06-03 | Dan Haren | R | 32 | W 3-7 | vs TEX | 12 | 268 | L | 5.0 | 7 | 2 | 2 | 0 | 2 | 2 | 104 | 44 | 60 | 58% | 3-6 | 3.51 | 1.23 |
| 2012-06-04 | Ervin Santana | R | 29 | W 6-8 | vs SEA | 12 | 215 | L | 4.2 | 8 | 7 | 7 | 1 | 6 | 1 | 102 | 45 | 57 | 56% | 2-7 | 5.35 | 1.45 |
| 2012-06-05 | Garrett Richards | R | 24 | L 6-1 | vs SEA | 1 | 4 | W | 7.0 | 4 | 1 | 1 | 1 | 2 | 8 | 109 | 40 | 69 | 63% | 1-0 | 1.13 | 0.75 |
| 2012-06-06 | Jerome Williams | R | 31 | W 6-8 | vs SEA | 10 | 87 | L | 5.2 | 9 | 7 | 5 | 0 | 0 | 6 | 98 | 35 | 63 | 64% | 6-3 | 4.00 | 1.32 |
| 2012-06-08 | C.J. Wilson | L | 32 | W 7-2 | @ COL | 13 | 86 | W | 8.0 | 5 | 1 | 1 | 0 | 1 | 9 | 101 | 34 | 67 | 66% | 7-4 | 2.39 | 1.09 |
| 2012-06-09 | Dan Haren | R | 32 | W 11-5 | @ COL | 13 | 269 | W | 5.1 | 10 | 4 | 4 | 4 | 1 | 4 | 107 | 38 | 69 | 64% | 4-6 | 3.73 | 1.29 |
| 2012-06-10 | Ervin Santana | R | 29 | W 10-8 | @ COL | 13 | 216 | W | 5.2 | 9 | 7 | 7 | 2 | 1 | 3 | 84 | 28 | 56 | 67% | 3-7 | 5.74 | 1.46 |
| 2012-06-11 | Garrett Richards | R | 24 | W 3-2 | @ LAN | 2 | 5 | - | 5.0 | 5 | 2 | 1 | 0 | 5 | 4 | 106 | 50 | 56 | 53% | 1-0 | 1.38 | 1.23 |
| 2012-06-12 | Jerome Williams | R | 31 | L 2-5 | @ LAN | 11 | 88 | L | 7.2 | 6 | 5 | 5 | 1 | 3 | 7 | 107 | 37 | 70 | 65% | 6-4 | 4.22 | 1.32 |
| 2012-06-13 | C.J. Wilson | L | 32 | W 2-1 | @ LAN | 14 | 87 | - | 7.0 | 4 | 1 | 1 | 0 | 5 | 3 | 110 | 50 | 60 | 55% | 7-4 | 2.30 | 1.10 |
| 2012-06-15 | Dan Haren | R | 32 | W 0-5 | vs ARI | 14 | 270 | L | 6.1 | 8 | 5 | 5 | 1 | 2 | 5 | 106 | 38 | 68 | 64% | 4-7 | 3.99 | 1.32 |
| 2012-06-16 | Ervin Santana | R | 29 | L 2-0 | vs ARI | 14 | 217 | W | 9.0 | 1 | 0 | 0 | 0 | 1 | 5 | 102 | 41 | 61 | 60% | 4-7 | 5.16 | 1.34 |
| 2012-06-17 | Garrett Richards | R | 24 | L 2-0 | vs ARI | 3 | 6 | W | 8.0 | 4 | 0 | 0 | 0 | 4 | 5 | 100 | 37 | 63 | 63% | 2-0 | 0.86 | 1.14 |
| 2012-06-18 | Jerome Williams | R | 31 | W 3-5 | vs SFN | 12 | 89 | L | 3.1 | 7 | 4 | 4 | 0 | 3 | 1 | 75 | 35 | 40 | 53% | 6-5 | 4.45 | 1.37 |
| 2012-06-19 | C.J. Wilson | L | 32 | L 12-5 | vs SFN | 15 | 88 | W | 6.1 | 10 | 5 | 3 | 0 | 1 | 3 | 113 | 40 | 73 | 65% | 8-4 | 2.45 | 1.15 |
| 2012-06-20 | Jered Weaver | R | 30 | L 6-0 | vs SFN | 12 | 189 | W | 6.0 | 2 | 0 | 0 | 0 | 2 | 3 | 77 | 30 | 47 | 61% | 7-1 | 2.40 | 0.91 |
| 2012-06-22 | Dan Haren | R | 32 | L 8-5 | vs LAN | 15 | 271 | W | 5.0 | 9 | 5 | 5 | 1 | 3 | 5 | 101 | 36 | 65 | 64% | 5-7 | 4.26 | 1.38 |
| 2012-06-23 | Ervin Santana | R | 29 | W 1-3 | vs LAN | 15 | 218 | L | 8.0 | 4 | 3 | 2 | 0 | 0 | 10 | 110 | 33 | 77 | 70% | 4-8 | 4.92 | 1.27 |
| 2012-06-24 | Garrett Richards | R | 24 | L 5-3 | vs LAN | 4 | 7 | - | 6.2 | 9 | 3 | 3 | 0 | 2 | 5 | 105 | 39 | 66 | 63% | 2-0 | 1.61 | 1.25 |
| 2012-06-26 | C.J. Wilson | L | 32 | W 7-3 | @ BAL | 16 | 89 | W | 7.0 | 6 | 1 | 1 | 1 | 2 | 2 | 113 | 47 | 66 | 58% | 9-4 | 2.36 | 1.15 |
| 2012-06-27 | Jered Weaver | R | 30 | W 13-1 | @ BAL | 13 | 190 | W | 6.2 | 6 | 1 | 1 | 0 | 1 | 6 | 96 | 37 | 59 | 61% | 8-1 | 2.30 | 0.91 |
| 2012-06-28 | Dan Haren | R | 32 | W 9-7 | @ TOR | 16 | 272 | W | 6.0 | 7 | 6 | 6 | 2 | 1 | 3 | 91 | 30 | 61 | 67% | 6-7 | 4.55 | 1.37 |
| 2012-06-29 | Ervin Santana | R | 29 | L 5-7 | @ TOR | 16 | 219 | - | 5.0 | 7 | 5 | 5 | 1 | 3 | 2 | 93 | 43 | 50 | 54% | 4-8 | 5.12 | 1.30 |
| 2012-06-30 | Garrett Richards | R | 24 | L 2-11 | @ TOR | 5 | 8 | L | 4.1 | 9 | 10 | 5 | 1 | 4 | 3 | 98 | 42 | 56 | 57% | 2-1 | 2.81 | 1.50 |
| 2012-07-01 | C.J. Wilson | L | 32 | W 10-6 | @ TOR | 17 | 90 | - | 5.0 | 3 | 2 | 1 | 0 | 5 | 3 | 97 | 49 | 48 | 49% | 9-4 | 2.34 | 1.17 |
| 2012-07-02 | Jered Weaver | R | 30 | W 3-0 | @ CLE | 14 | 191 | W | 7.0 | 5 | 0 | 0 | 0 | 3 | 2 | 106 | 40 | 66 | 62% | 9-1 | 2.12 | 0.93 |
| 2012-07-03 | Dan Haren | R | 32 | L 5-9 | @ CLE | 17 | 273 | L | 4.1 | 9 | 7 | 6 | 1 | 1 | 1 | 69 | 26 | 43 | 62% | 6-8 | 4.85 | 1.40 |
| 2012-07-04 | Ervin Santana | R | 29 | L 3-12 | @ CLE | 17 | 220 | L | 1.1 | 6 | 8 | 8 | 1 | 3 | 0 | 58 | 25 | 33 | 57% | 4-9 | 5.77 | 1.38 |
| 2012-07-05 | Garrett Richards | R | 24 | L 9-7 | vs BAL | 6 | 9 | - | 4.1 | 10 | 7 | 7 | 3 | 2 | 3 | 83 | 32 | 51 | 61% | 2-1 | 4.25 | 1.67 |
| 2012-07-06 | C.J. Wilson | L | 32 | W 2-3 | vs BAL | 18 | 91 | L | 7.0 | 4 | 3 | 3 | 1 | 3 | 4 | 119 | 47 | 72 | 61% | 9-5 | 2.43 | 1.16 |
| 2012-07-07 | Jered Weaver | R | 30 | L 3-0 | vs BAL | 15 | 192 | W | 8.0 | 3 | 0 | 0 | 0 | 1 | 5 | 108 | 39 | 69 | 64% | 10-1 | 1.95 | 0.90 |
| 2012-07-08 | Brad Mills | L | 27 | L 6-0 | vs BAL | 1 | 10 | W | 5.0 | 3 | 0 | 0 | 0 | 0 | 6 | 88 | 29 | 59 | 67% | 1-0 | 0.00 | 0.60 |
| 2012-07-13 | C.J. Wilson | L | 32 | L 5-6 | @ NYA | 19 | 92 | - | 7.0 | 5 | 2 | 2 | 1 | 2 | 7 | 101 | 36 | 65 | 64% | 9-5 | 2.44 | 1.15 |
| 2012-07-14 | Jerome Williams | R | 31 | L 3-5 | @ NYA | 13 | 90 | L | 6.0 | 7 | 5 | 5 | 2 | 1 | 4 | 102 | 41 | 61 | 60% | 6-6 | 4.65 | 1.37 |
| 2012-07-15 | Jered Weaver | R | 30 | W 10-8 | @ NYA | 16 | 193 | W | 7.0 | 10 | 5 | 5 | 3 | 1 | 4 | 99 | 32 | 67 | 68% | 11-1 | 2.25 | 0.94 |
| 2012-07-16 | Ervin Santana | R | 30 | L 6-8 | @ DET | 18 | 221 | - | 6.0 | 8 | 4 | 2 | 0 | 2 | 2 | 98 | 40 | 58 | 59% | 4-9 | 5.61 | 1.39 |
| 2012-07-17 | Garrett Richards | R | 24 | W 13-0 | @ DET | 7 | 10 | W | 7.0 | 3 | 0 | 0 | 0 | 4 | 2 | 100 | 42 | 58 | 58% | 3-1 | 3.56 | 1.56 |
| 2012-07-18 | C.J. Wilson | L | 32 | L 2-7 | @ DET | 20 | 93 | L | 6.0 | 8 | 7 | 7 | 0 | 5 | 7 | 122 | 56 | 66 | 54% | 9-6 | 2.83 | 1.20 |
| 2012-07-19 | Jerome Williams | R | 31 | L 1-5 | @ DET | 14 | 91 | L | 6.0 | 9 | 5 | 5 | 2 | 1 | 3 | 94 | 31 | 63 | 67% | 6-7 | 4.83 | 1.39 |
| 2012-07-20 | Jered Weaver | R | 30 | L 6-1 | vs TEX | 17 | 194 | W | 7.0 | 6 | 1 | 1 | 1 | 1 | 4 | 116 | 40 | 76 | 66% | 12-1 | 2.19 | 0.95 |
| 2012-07-21 | Ervin Santana | R | 30 | W 2-9 | vs TEX | 19 | 222 | L | 1.2 | 8 | 6 | 6 | 3 | 0 | 0 | 47 | 17 | 30 | 64% | 4-10 | 6.00 | 1.44 |
| 2012-07-22 | Dan Haren | R | 32 | L 7-4 | vs TEX | 18 | 274 | W | 6.0 | 3 | 2 | 2 | 1 | 3 | 3 | 95 | 33 | 62 | 65% | 7-8 | 4.75 | 1.38 |
| 2012-07-23 | C.J. Wilson | L | 32 | L 6-3 | vs KCA | 21 | 94 | - | 6.2 | 9 | 3 | 3 | 0 | 1 | 6 | 113 | 42 | 71 | 63% | 9-6 | 2.89 | 1.21 |
| 2012-07-24 | Garrett Richards | R | 24 | W 1-4 | vs KCA | 8 | 11 | L | 5.0 | 5 | 4 | 4 | 1 | 3 | 2 | 96 | 39 | 57 | 59% | 3-2 | 3.94 | 1.56 |
| 2012-07-25 | Jered Weaver | R | 30 | L 11-6 | vs KCA | 18 | 195 | W | 5.0 | 3 | 2 | 2 | 1 | 2 | 8 | 100 | 42 | 58 | 58% | 13-1 | 2.25 | 0.95 |
| 2012-07-27 | Dan Haren | R | 32 | L 3-1 | vs TBA | 19 | 275 | W | 6.0 | 5 | 1 | 1 | 1 | 1 | 6 | 97 | 37 | 60 | 62% | 8-8 | 4.58 | 1.36 |
| 2012-07-28 | C.J. Wilson | L | 32 | W 0-3 | vs TBA | 22 | 95 | L | 6.2 | 4 | 3 | 2 | 1 | 3 | 7 | 121 | 52 | 69 | 57% | 9-7 | 2.87 | 1.20 |
| 2012-07-29 | Zack Greinke | R | 29 | W 0-2 | vs TBA | 22 | 219 | L | 7.0 | 7 | 2 | 2 | 0 | 1 | 8 | 110 | 41 | 69 | 63% | 9-4 | 3.39 | 1.20 |
| 2012-07-30 | Ervin Santana | R | 30 | W 15-8 | @ TEX | 20 | 223 | W | 5.0 | 4 | 3 | 3 | 1 | 1 | 3 | 69 | 25 | 44 | 64% | 5-10 | 5.97 | 1.42 |
| 2012-07-31 | Jered Weaver | R | 30 | W 6-2 | @ TEX | 19 | 196 | W | 6.1 | 5 | 2 | 2 | 0 | 1 | 3 | 95 | 34 | 61 | 64% | 14-1 | 2.29 | 0.95 |
| 2012-08-01 | Garrett Richards | R | 24 | L 10-11 | @ TEX | 9 | 12 | - | 5.2 | 9 | 5 | 5 | 0 | 1 | 2 | 97 | 42 | 55 | 57% | 3-2 | 4.33 | 1.57 |
| 2012-08-02 | C.J. Wilson | L | 32 | L 9-15 | @ TEX | 23 | 96 | - | 5.1 | 10 | 8 | 8 | 2 | 3 | 7 | 112 | 47 | 65 | 58% | 9-7 | 3.27 | 1.25 |
| 2012-08-03 | Zack Greinke | R | 29 | L 6-8 | @ CHA | 23 | 220 | - | 7.0 | 10 | 6 | 6 | 2 | 2 | 4 | 116 | 42 | 74 | 64% | 9-4 | 3.61 | 1.23 |
| 2012-08-04 | Ervin Santana | R | 30 | W 6-5 | @ CHA | 21 | 224 | - | 6.0 | 5 | 3 | 2 | 2 | 1 | 3 | 93 | 28 | 65 | 70% | 5-10 | 5.83 | 1.40 |
| 2012-08-05 | Dan Haren | R | 32 | L 2-4 | @ CHA | 20 | 276 | - | 6.0 | 4 | 1 | 1 | 1 | 2 | 4 | 110 | 46 | 64 | 58% | 8-8 | 4.43 | 1.34 |
| 2012-08-06 | Jered Weaver | R | 30 | W 4-0 | @ OAK | 20 | 197 | W | 9.0 | 4 | 0 | 0 | 0 | 0 | 9 | 115 | 37 | 78 | 68% | 15-1 | 2.13 | 0.92 |
| 2012-08-07 | C.J. Wilson | L | 32 | L 4-10 | @ OAK | 24 | 97 | L | 5.0 | 9 | 6 | 3 | 1 | 5 | 4 | 118 | 52 | 66 | 56% | 9-8 | 3.34 | 1.30 |
| 2012-08-08 | Zack Greinke | R | 29 | L 8-9 | @ OAK | 24 | 221 | - | 5.0 | 6 | 4 | 4 | 1 | 5 | 3 | 109 | 48 | 61 | 56% | 9-4 | 3.74 | 1.26 |
| 2012-08-10 | Ervin Santana | R | 30 | L 6-5 | vs SEA | 22 | 225 | - | 6.1 | 5 | 5 | 4 | 2 | 1 | 6 | 91 | 29 | 62 | 68% | 5-10 | 5.84 | 1.38 |
| 2012-08-11 | Dan Haren | R | 32 | W 4-7 | vs SEA | 21 | 277 | L | 3.1 | 5 | 7 | 5 | 1 | 3 | 0 | 63 | 24 | 39 | 62% | 8-9 | 4.68 | 1.38 |
| 2012-08-12 | Jered Weaver | R | 30 | W 1-4 | vs SEA | 21 | 198 | L | 7.0 | 4 | 3 | 3 | 2 | 3 | 5 | 104 | 39 | 65 | 63% | 15-2 | 2.22 | 0.92 |
| 2012-08-13 | C.J. Wilson | L | 32 | W 2-6 | vs CLE | 25 | 98 | L | 6.2 | 6 | 3 | 2 | 1 | 1 | 5 | 97 | 33 | 64 | 66% | 9-9 | 3.31 | 1.29 |
| 2012-08-14 | Zack Greinke | R | 29 | L 9-6 | vs CLE | 25 | 222 | W | 7.0 | 8 | 4 | 4 | 1 | 1 | 5 | 111 | 38 | 73 | 66% | 10-4 | 3.81 | 1.26 |
| 2012-08-15 | Ervin Santana | R | 30 | L 8-4 | vs CLE | 23 | 226 | W | 7.0 | 4 | 1 | 1 | 0 | 1 | 4 | 102 | 38 | 64 | 63% | 6-10 | 5.60 | 1.35 |
| 2012-08-16 | Dan Haren | R | 32 | W 0-7 | vs TBA | 22 | 278 | L | 3.2 | 7 | 5 | 5 | 2 | 0 | 2 | 60 | 20 | 40 | 67% | 8-10 | 4.88 | 1.39 |
| 2012-08-17 | Jered Weaver | R | 30 | W 3-12 | vs TBA | 22 | 199 | L | 3.0 | 8 | 9 | 9 | 2 | 2 | 2 | 58 | 21 | 37 | 64% | 15-3 | 2.74 | 0.97 |
| 2012-08-18 | C.J. Wilson | L | 32 | W 8-10 | vs TBA | 26 | 99 | - | 4.2 | 6 | 7 | 7 | 1 | 3 | 4 | 90 | 37 | 53 | 59% | 9-9 | 3.62 | 1.31 |
| 2012-08-19 | Zack Greinke | R | 29 | W 3-8 | vs TBA | 26 | 223 | L | 6.0 | 7 | 6 | 6 | 1 | 4 | 8 | 112 | 48 | 64 | 57% | 10-5 | 4.01 | 1.28 |
| 2012-08-21 | Ervin Santana | R | 30 | W 5-3 | @ BOS | 24 | 227 | W | 6.1 | 5 | 2 | 2 | 1 | 2 | 4 | 99 | 38 | 61 | 62% | 7-10 | 5.45 | 1.33 |
| 2012-08-22 | Jered Weaver | R | 30 | W 7-3 | @ BOS | 23 | 200 | W | 7.0 | 7 | 2 | 2 | 0 | 1 | 5 | 106 | 41 | 65 | 61% | 16-3 | 2.74 | 0.98 |
| 2012-08-23 | C.J. Wilson | L | 32 | W 14-13 | @ BOS | 27 | 100 | - | 5.0 | 8 | 7 | 6 | 1 | 0 | 6 | 102 | 34 | 68 | 67% | 9-9 | 3.84 | 1.32 |
| 2012-08-24 | Zack Greinke | R | 29 | W 2-1 | @ DET | 27 | 224 | W | 7.2 | 5 | 1 | 1 | 1 | 2 | 5 | 115 | 44 | 71 | 62% | 11-5 | 3.87 | 1.26 |
| 2012-08-25 | Dan Haren | R | 32 | L 3-5 | @ DET | 23 | 279 | - | 5.2 | 8 | 2 | 2 | 0 | 0 | 7 | 94 | 31 | 63 | 67% | 8-10 | 4.84 | 1.40 |
| 2012-08-26 | Ervin Santana | R | 30 | L 2-5 | @ DET | 25 | 228 | L | 7.0 | 5 | 4 | 4 | 2 | 3 | 5 | 100 | 34 | 66 | 66% | 7-11 | 5.44 | 1.32 |
| 2012-08-28 | Jered Weaver | R | 30 | L 6-5 | vs BOS | 24 | 201 | - | 7.0 | 7 | 5 | 4 | 1 | 1 | 5 | 105 | 35 | 70 | 67% | 16-3 | 2.85 | 0.99 |
| 2012-08-29 | C.J. Wilson | L | 32 | L 10-3 | vs BOS | 28 | 101 | W | 6.0 | 8 | 3 | 3 | 0 | 2 | 4 | 108 | 36 | 72 | 67% | 10-9 | 3.86 | 1.34 |
| 2012-08-30 | Zack Greinke | R | 29 | L 5-2 | vs BOS | 28 | 225 | W | 7.0 | 5 | 2 | 2 | 1 | 2 | 7 | 105 | 44 | 61 | 58% | 12-5 | 3.81 | 1.25 |
| 2012-08-31 | Dan Haren | R | 32 | W 9-1 | @ SEA | 24 | 280 | W | 7.0 | 5 | 1 | 0 | 0 | 0 | 3 | 100 | 37 | 63 | 63% | 9-10 | 4.60 | 1.36 |
| 2012-09-01 | Ervin Santana | R | 30 | W 5-2 | @ SEA | 26 | 229 | W | 7.0 | 4 | 2 | 2 | 1 | 2 | 5 | 101 | 39 | 62 | 61% | 8-11 | 5.31 | 1.30 |
| 2012-09-02 | Jered Weaver | R | 30 | L 1-2 | @ SEA | 25 | 202 | L | 5.1 | 8 | 2 | 2 | 2 | 4 | 3 | 87 | 37 | 50 | 57% | 16-4 | 2.87 | 1.03 |
| 2012-09-03 | C.J. Wilson | L | 32 | W 8-3 | @ OAK | 29 | 102 | W | 5.0 | 5 | 2 | 2 | 1 | 2 | 3 | 89 | 33 | 56 | 63% | 11-9 | 3.86 | 1.34 |
| 2012-09-04 | Zack Greinke | R | 29 | W 6-1 | @ OAK | 29 | 226 | W | 7.0 | 4 | 1 | 1 | 1 | 2 | 4 | 105 | 41 | 64 | 61% | 13-5 | 3.71 | 1.24 |
| 2012-09-05 | Dan Haren | R | 32 | W 7-1 | @ OAK | 25 | 281 | W | 6.0 | 3 | 1 | 1 | 0 | 3 | 7 | 98 | 40 | 58 | 59% | 10-10 | 4.47 | 1.35 |
| 2012-09-07 | Ervin Santana | R | 30 | L 3-2 | vs DET | 27 | 230 | - | 6.2 | 4 | 2 | 2 | 2 | 1 | 10 | 99 | 32 | 67 | 68% | 8-11 | 5.22 | 1.28 |
| 2012-09-08 | C.J. Wilson | L | 32 | L 6-1 | vs DET | 30 | 103 | W | 7.2 | 4 | 1 | 0 | 0 | 2 | 6 | 98 | 35 | 63 | 64% | 12-9 | 3.69 | 1.31 |
| 2012-09-09 | Zack Greinke | R | 29 | L 3-2 | vs DET | 30 | 227 | W | 7.0 | 5 | 2 | 2 | 1 | 1 | 7 | 103 | 37 | 66 | 64% | 14-5 | 3.67 | 1.22 |
| 2012-09-10 | Dan Haren | R | 32 | W 1-3 | vs OAK | 26 | 282 | L | 6.1 | 4 | 3 | 3 | 2 | 0 | 4 | 74 | 23 | 51 | 69% | 10-11 | 4.44 | 1.31 |
| 2012-09-11 | Jerome Williams | R | 31 | W 5-6 | vs OAK | 15 | 92 | L | 3.1 | 5 | 4 | 4 | 2 | 1 | 4 | 66 | 25 | 41 | 62% | 6-8 | 4.75 | 1.33 |
| 2012-09-12 | Ervin Santana | R | 30 | W 1-4 | vs OAK | 28 | 231 | L | 6.0 | 4 | 2 | 1 | 1 | 3 | 6 | 103 | 38 | 65 | 63% | 8-12 | 5.09 | 1.28 |
| 2012-09-13 | Jered Weaver | R | 30 | L 6-0 | vs OAK | 26 | 203 | W | 7.0 | 2 | 0 | 0 | 0 | 1 | 9 | 94 | 30 | 64 | 68% | 17-4 | 2.75 | 1.01 |
| 2012-09-14 | C.J. Wilson | L | 32 | W 9-7 | @ KCA | 31 | 104 | - | 5.0 | 4 | 4 | 3 | 2 | 2 | 5 | 89 | 33 | 56 | 63% | 12-9 | 3.73 | 1.31 |
| 2012-09-15 | Zack Greinke | R | 29 | L 2-3 | @ KCA | 31 | 228 | - | 8.1 | 5 | 1 | 1 | 0 | 2 | 3 | 113 | 43 | 70 | 62% | 14-5 | 3.56 | 1.21 |
| 2012-09-16 | Dan Haren | R | 32 | W 4-3 | @ KCA | 27 | 283 | W | 5.2 | 5 | 3 | 2 | 1 | 1 | 5 | 97 | 35 | 62 | 64% | 11-11 | 4.42 | 1.31 |
| 2012-09-18 | Jered Weaver | R | 30 | L 11-3 | vs TEX | 27 | 204 | W | 7.0 | 6 | 3 | 3 | 2 | 1 | 2 | 86 | 30 | 56 | 65% | 18-4 | 2.79 | 1.01 |
| 2012-09-19 | C.J. Wilson | L | 32 | W 2-6 | vs TEX | 32 | 105 | L | 2.2 | 4 | 3 | 3 | 0 | 3 | 2 | 66 | 31 | 35 | 53% | 12-10 | 3.82 | 1.32 |
| 2012-09-20 | Zack Greinke | R | 29 | W 1-3 | vs TEX | 32 | 229 | - | 8.0 | 5 | 1 | 1 | 0 | 0 | 8 | 109 | 35 | 74 | 68% | 14-5 | 3.47 | 1.19 |
| 2012-09-21 | Ervin Santana | R | 30 | L 6-2 | vs CHA | 29 | 232 | W | 7.0 | 2 | 1 | 1 | 1 | 1 | 11 | 105 | 40 | 65 | 62% | 9-12 | 4.94 | 1.25 |
| 2012-09-22 | Dan Haren | R | 32 | L 4-2 | vs CHA | 28 | 284 | W | 6.0 | 6 | 2 | 2 | 1 | 1 | 4 | 92 | 32 | 60 | 65% | 12-11 | 4.36 | 1.30 |
| 2012-09-23 | Jered Weaver | R | 30 | L 4-1 | vs CHA | 28 | 205 | W | 6.1 | 5 | 1 | 1 | 0 | 1 | 4 | 111 | 39 | 72 | 65% | 19-4 | 2.73 | 1.00 |
| 2012-09-25 | Zack Greinke | R | 29 | L 5-4 | vs SEA | 33 | 230 | W | 5.0 | 7 | 1 | 1 | 1 | 2 | 13 | 105 | 38 | 67 | 64% | 15-5 | 3.42 | 1.20 |
| 2012-09-26 | C.J. Wilson | L | 32 | L 4-3 | vs SEA | 33 | 106 | - | 5.1 | 5 | 3 | 3 | 1 | 3 | 5 | 86 | 31 | 55 | 64% | 12-10 | 3.86 | 1.33 |
| 2012-09-27 | Dan Haren | R | 32 | W 4-9 | vs SEA | 29 | 285 | L | 5.1 | 6 | 3 | 2 | 1 | 0 | 3 | 80 | 26 | 54 | 68% | 12-12 | 4.32 | 1.29 |
| 2012-09-28 | Jered Weaver | R | 30 | W 7-4 | @ TEX | 29 | 206 | W | 7.0 | 5 | 2 | 2 | 1 | 2 | 5 | 97 | 38 | 59 | 61% | 20-4 | 2.73 | 1.00 |
| 2012-09-30 | Zack Greinke | R | 29 | W 5-4 | @ TEX | 34 | 231 | - | 7.1 | 6 | 4 | 4 | 1 | 2 | 3 | 108 | 45 | 63 | 58% | 15-5 | 3.48 | 1.20 |
| 2012-09-30 | Ervin Santana | R | 30 | L 7-8 | @ TEX | 30 | 233 | L | 2.2 | 7 | 6 | 6 | 3 | 1 | 1 | 55 | 19 | 36 | 65% | 9-13 | 5.16 | 1.27 |
| 2012-10-01 | C.J. Wilson | L | 32 | W 8-4 | @ SEA | 34 | 107 | W | 6.1 | 6 | 3 | 2 | 1 | 5 | 7 | 106 | 39 | 67 | 63% | 13-10 | 3.83 | 1.35 |
| 2012-10-02 | Dan Haren | R | 32 | L 1-6 | @ SEA | 30 | 286 | L | 6.0 | 7 | 5 | 3 | 1 | 0 | 8 | 101 | 37 | 64 | 63% | 12-13 | 4.32 | 1.29 |
| 2012-10-03 | Jered Weaver | R | 30 | L 0-12 | @ SEA | 30 | 207 | L | 1.0 | 2 | 2 | 2 | 0 | 2 | 1 | 25 | 12 | 13 | 52% | 20-5 | 2.81 | 1.02 |