| 2012 NL Leaders | |||||||||||||
| Name | Age | Team | G | IP | TBF | BB% | K% | BABIP | LOB% | GB% | HR/Air | ERA | FIP |
| Esmil Rogers | 27 | Colorado | 23 | 25.67 | 131 | 13.7% | 22.1% | .436 | 62% | 49% | 5% | 8.06 | 4.22 |
| David Carpenter | 27 | Houston | 30 | 29.67 | 143 | 9.8% | 18.9% | .424 | 71% | 42% | 7% | 6.07 | 4.58 |
| Elvin Ramirez | 25 | NY Mets | 20 | 21.33 | 102 | 19.6% | 21.6% | .404 | 73% | 45% | 3% | 5.49 | 4.49 |
| Guillermo Mota | 39 | San Francisco | 26 | 20.67 | 91 | 8.8% | 26.4% | .396 | 70% | 40% | 9% | 5.22 | 4.14 |
| Chien-Ming Wang | 32 | Washington | 10 | 32.33 | 158 | 9.5% | 9.5% | .395 | 72% | 51% | 8% | 6.68 | 5.88 |
| Juan Nicasio | Colorado | 11 | 58.00 | 257 | 8.6% | 21.0% | .387 | 68% | 38% | 6% | 5.28 | 4.02 | |
| Guillermo Moscoso | 29 | Colorado | 23 | 50.00 | 231 | 8.2% | 20.3% | .383 | 70% | 36% | 8% | 6.12 | 4.53 |
| Casey Kelly | 23 | San Diego | 6 | 29.00 | 136 | 7.4% | 19.1% | .382 | 64% | 53% | 11% | 6.21 | 4.82 |
| Daniel Hudson | 25 | Arizona | 9 | 45.33 | 202 | 5.9% | 18.3% | .376 | 60% | 38% | 9% | 7.35 | 4.87 |
| Casey Coleman | Chi Cubs | 17 | 24.33 | 119 | 10.1% | 13.4% | .376 | 69% | 44% | 10% | 7.40 | 5.96 | |
| Livan Hernandez | 37 | Atlanta | 18 | 31.00 | 136 | 5.9% | 14.0% | .376 | 76% | 37% | 8% | 4.94 | 4.77 |
| Rex Brothers | Colorado | 75 | 67.67 | 295 | 12.5% | 28.1% | .372 | 72% | 48% | 6% | 3.86 | 3.32 | |
| Fernando Abad | 27 | Houston | 37 | 46.00 | 208 | 9.1% | 18.3% | .370 | 74% | 42% | 7% | 5.09 | 4.61 |
| Jonathan Venters | Atlanta | 66 | 58.67 | 262 | 10.7% | 26.3% | .369 | 83% | 62% | 10% | 3.22 | 3.79 | |
| Joe Thatcher | 31 | San Diego | 55 | 31.67 | 141 | 9.9% | 27.7% | .368 | 77% | 44% | 4% | 3.41 | 3.10 |
| Victor Marte | St. Louis | 48 | 40.33 | 185 | 7.6% | 19.5% | .366 | 77% | 50% | 9% | 4.91 | 4.47 | |
| Tim Dillard | 29 | Milwaukee | 34 | 37.00 | 166 | 8.4% | 17.5% | .365 | 70% | 53% | 5% | 4.38 | 3.83 |
| Juan Cruz | 34 | Pittsburgh | 43 | 35.67 | 162 | 11.7% | 20.4% | .364 | 86% | 38% | 5% | 2.78 | 4.22 |
| Brad Penny | 34 | San Francisco | 22 | 28.00 | 133 | 6.8% | 7.5% | .358 | 65% | 52% | 8% | 6.11 | 5.34 |
| Jeff Francis | 32 | Colorado | 24 | 113.00 | 502 | 4.4% | 15.1% | .358 | 68% | 51% | 8% | 5.58 | 4.30 |
| Vance Worley | 25 | Philadelphia | 23 | 133.00 | 590 | 8.0% | 18.1% | .358 | 73% | 45% | 5% | 4.26 | 3.89 |
| Jim Henderson | 30 | Milwaukee | 36 | 30.67 | 131 | 9.9% | 34.4% | .358 | 72% | 43% | 2% | 3.23 | 1.99 |
| Jair Jurrjens | 26 | Atlanta | 11 | 48.33 | 227 | 7.9% | 8.4% | .358 | 64% | 39% | 7% | 6.89 | 5.67 |
| Jamie Moyer | 50 | Colorado | 10 | 53.67 | 254 | 7.1% | 14.2% | .356 | 69% | 45% | 10% | 5.70 | 5.57 |
| Joe Blanton | 32 | LA Dodgers | 10 | 57.67 | 246 | 6.5% | 20.7% | .355 | 69% | 49% | 8% | 4.99 | 3.77 |
| Collin McHugh | NY Mets | 8 | 21.33 | 99 | 8.1% | 17.2% | .355 | 53% | 40% | 12% | 7.59 | 5.99 | |
| Randy Wells | 30 | Chi Cubs | 12 | 28.67 | 143 | 16.8% | 9.8% | .354 | 72% | 39% | 2% | 5.34 | 5.32 |
| Christopher Rusin | Chi Cubs | 7 | 29.67 | 135 | 8.1% | 15.6% | .354 | 65% | 48% | 8% | 6.37 | 4.88 | |
| Jacob Diekman | Philadelphia | 32 | 27.33 | 131 | 15.3% | 26.7% | .353 | 67% | 53% | 3% | 3.95 | 3.57 | |
| Jaime Garcia | 26 | St. Louis | 20 | 121.67 | 515 | 5.8% | 19.0% | .353 | 69% | 54% | 4% | 3.92 | 3.00 |
