| 2012 NL Leaders | |||||||||||||
| Name | Age | Team | G | IP | TBF | BB% | K% | BABIP | LOB% | GB% | HR/Air | ERA | FIP |
| Bill Bray | 29 | Cincinnati | 14 | 8.67 | 43 | 32.6% | 16.3% | .222 | 87% | 30% | 13% | 5.19 | 9.36 |
| Kerry Wood | 35 | Chi Cubs | 10 | 8.67 | 42 | 26.2% | 14.3% | .304 | 62% | 42% | 7% | 8.30 | 7.05 |
| Juan Perez | 34 | Milwaukee | 10 | 7.00 | 35 | 22.9% | 28.6% | .308 | 90% | 47% | 25% | 5.14 | 7.84 |
| Todd Redmond | 27 | Cincinnati | 1 | 3.33 | 22 | 22.7% | 9.1% | .429 | 75% | 33% | 10% | 10.81 | 10.33 |
| Brad Lidge | 36 | Washington | 11 | 9.33 | 51 | 21.6% | 19.6% | .478 | 60% | 48% | 8% | 9.65 | 5.91 |
| Edwar Cabrera | 25 | Colorado | 2 | 5.67 | 33 | 21.2% | 15.2% | .353 | 59% | 43% | 26% | 11.11 | 11.95 |
| John Ely | LA Dodgers | 2 | 2.67 | 19 | 21.1% | 15.8% | .750 | 45% | 55% | 0% | 20.22 | 6.50 | |
| Daniel Runzler | San Francisco | 6 | 3.67 | 15 | 20.0% | 33.3% | .250 | 100% | 33% | 0% | 0.00 | 3.67 | |
| Matt Palmer | 33 | San Diego | 3 | 2.00 | 10 | 20.0% | 20.0% | .250 | 77% | 33% | 25% | 9.00 | 10.63 |
| Jaye Chapman | 25 | Chi Cubs | 14 | 12.00 | 50 | 20.0% | 24.0% | .308 | 72% | 50% | 0% | 3.75 | 3.63 |
| Elvin Ramirez | 25 | NY Mets | 20 | 21.33 | 102 | 19.6% | 21.6% | .404 | 73% | 45% | 3% | 5.49 | 4.49 |
| Brian Fuentes | 37 | St. Louis | 6 | 5.00 | 26 | 19.2% | 23.1% | .385 | 62% | 40% | 11% | 9.00 | 6.33 |
| Mike MacDougal | 35 | LA Dodgers | 7 | 5.67 | 32 | 18.8% | 12.5% | .409 | 67% | 37% | 0% | 7.94 | 4.89 |
| Eduardo Sanchez | St. Louis | 17 | 15.00 | 70 | 18.6% | 18.6% | .257 | 63% | 44% | 9% | 6.60 | 5.93 | |
| Carlos Marmol | 30 | Chi Cubs | 61 | 55.33 | 247 | 18.2% | 29.1% | .290 | 77% | 41% | 5% | 3.42 | 4.01 |
| Yusmeiro Petit | 28 | San Francisco | 1 | 4.67 | 22 | 18.2% | 4.5% | .438 | 82% | 35% | 0% | 3.85 | 5.27 |
| Alberto Cabrera | 24 | Chi Cubs | 25 | 21.67 | 99 | 18.2% | 27.3% | .306 | 60% | 44% | 3% | 5.40 | 3.87 |
| Jeurys Familia | 23 | NY Mets | 8 | 12.33 | 52 | 17.3% | 19.2% | .303 | 58% | 50% | 0% | 5.84 | 3.70 |
| Trevor Bauer | Arizona | 4 | 16.33 | 77 | 16.9% | 22.1% | .286 | 60% | 47% | 8% | 6.06 | 5.21 | |
| Henry Alberto Rodriguez | 25 | Washington | 35 | 29.33 | 131 | 16.8% | 23.7% | .211 | 60% | 38% | 8% | 5.83 | 5.14 |
| Randy Wells | 30 | Chi Cubs | 12 | 28.67 | 143 | 16.8% | 9.8% | .354 | 72% | 39% | 2% | 5.34 | 5.32 |
| Brian Wilson | 30 | San Francisco | 2 | 2.00 | 12 | 16.7% | 16.7% | .500 | 67% | 29% | 0% | 9.00 | 4.13 |
| Luis Valdez | 28 | Chi Cubs | 12 | 14.67 | 67 | 16.4% | 11.9% | .239 | 79% | 48% | 4% | 3.07 | 5.17 |
| Joshua Lindblom | 25 | Philadelphia | 26 | 23.33 | 107 | 15.9% | 25.2% | .268 | 70% | 30% | 10% | 4.63 | 5.36 |
| Charles Fick | Houston | 18 | 23.00 | 107 | 15.9% | 15.9% | .339 | 80% | 47% | 11% | 4.30 | 6.39 | |
| Jonathan Sanchez | 30 | Colorado | 3 | 11.33 | 57 | 15.8% | 15.8% | .424 | 60% | 34% | 12% | 9.53 | 7.36 |
| Blake Parker | 27 | Chi Cubs | 7 | 6.00 | 32 | 15.6% | 18.8% | .412 | 74% | 40% | 25% | 6.00 | 10.13 |
| Alexander Hinshaw | 30 | San Diego | 31 | 28.00 | 129 | 15.5% | 27.9% | .286 | 82% | 42% | 12% | 4.50 | 5.23 |
| Steven Rodriguez | LA Dodgers | 11 | 6.67 | 26 | 15.4% | 23.1% | .200 | 86% | 47% | 0% | 1.35 | 3.13 | |
| Jacob Diekman | Philadelphia | 32 | 27.33 | 131 | 15.3% | 26.7% | .353 | 67% | 53% | 3% | 3.95 | 3.57 | |
