| 2012 NL Leaders | |||||||||||||
| Name | Age | Team | G | IP | TBF | BB% | K% | BABIP | LOB% | GB% | HR/Air | ERA | FIP |
| Charles Fick | St. Louis | 2 | 1.67 | 9 | 11.1% | 0.0% | .429 | 75% | 0% | 0% | 5.39 | 4.92 | |
| Zach Putnam | 25 | Colorado | 2 | 2.00 | 9 | 11.1% | 0.0% | .429 | 100% | 38% | 0% | 0.00 | 4.63 |
| Joseph Paterson | Arizona | 6 | 2.67 | 26 | 11.5% | 0.0% | .619 | 46% | 57% | 20% | 37.08 | 16.24 | |
| Christopher Schwinden | 26 | NY Mets | 3 | 8.67 | 46 | 6.5% | 2.2% | .297 | 40% | 50% | 19% | 12.46 | 9.93 |
| Yusmeiro Petit | 28 | San Francisco | 1 | 4.67 | 22 | 18.2% | 4.5% | .438 | 82% | 35% | 0% | 3.85 | 5.27 |
| Jeff Suppan | 38 | San Diego | 6 | 30.67 | 137 | 9.5% | 5.1% | .280 | 68% | 58% | 8% | 5.28 | 5.64 |
| Mike McClendon | 27 | Milwaukee | 9 | 14.00 | 69 | 7.2% | 5.8% | .358 | 64% | 50% | 4% | 6.43 | 5.20 |
| Rodrigo Lopez | 37 | Chi Cubs | 4 | 6.33 | 34 | 14.7% | 5.9% | .320 | 57% | 27% | 0% | 5.69 | 5.34 |
| Brad Penny | 34 | San Francisco | 22 | 28.00 | 133 | 6.8% | 7.5% | .358 | 65% | 52% | 8% | 6.11 | 5.34 |
| Joshua Stinson | 24 | Milwaukee | 6 | 9.33 | 38 | 13.2% | 7.9% | .207 | 104% | 48% | 6% | 0.96 | 5.49 |
| Travis Blackley | 30 | San Francisco | 4 | 5.00 | 25 | 8.0% | 8.0% | .350 | 33% | 43% | 0% | 9.00 | 3.53 |
| Shane Loux | 33 | San Francisco | 19 | 25.33 | 112 | 8.0% | 8.0% | .322 | 71% | 52% | 7% | 4.97 | 5.02 |
| Miguel Batista | 41 | Atlanta | 5 | 6.00 | 24 | 8.3% | 8.3% | .222 | 89% | 42% | 9% | 3.00 | 5.63 |
| Jair Jurrjens | 26 | Atlanta | 11 | 48.33 | 227 | 7.9% | 8.4% | .358 | 64% | 39% | 7% | 6.89 | 5.67 |
| Ryan Perry | Washington | 7 | 8.00 | 35 | 5.7% | 8.6% | .357 | 45% | 37% | 11% | 10.13 | 6.38 | |
| Robert Carson | NY Mets | 17 | 13.33 | 57 | 7.0% | 8.8% | .256 | 74% | 35% | 7% | 4.73 | 5.68 | |
| Todd Redmond | 27 | Cincinnati | 1 | 3.33 | 22 | 22.7% | 9.1% | .429 | 75% | 33% | 10% | 10.81 | 10.33 |
| Chien-Ming Wang | 32 | Washington | 10 | 32.33 | 158 | 9.5% | 9.5% | .395 | 72% | 51% | 8% | 6.68 | 5.88 |
| Peter Moylan | 34 | Atlanta | 8 | 5.00 | 21 | 9.5% | 9.5% | .133 | 56% | 50% | 12% | 1.80 | 6.13 |
| Randy Wells | 30 | Chi Cubs | 12 | 28.67 | 143 | 16.8% | 9.8% | .354 | 72% | 39% | 2% | 5.34 | 5.32 |
| Dallas Keuchel | Houston | 16 | 85.33 | 377 | 10.3% | 10.1% | .287 | 68% | 51% | 10% | 5.27 | 5.78 | |
| Chad Qualls | 34 | Pittsburgh | 17 | 13.67 | 58 | 3.4% | 10.3% | .292 | 31% | 55% | 0% | 6.58 | 2.69 |
| Jeremy Guthrie | 33 | Colorado | 19 | 90.67 | 422 | 7.3% | 10.7% | .328 | 67% | 43% | 11% | 6.35 | 6.40 |
| Jenrry Mejia | NY Mets | 5 | 16.00 | 74 | 12.2% | 10.8% | .333 | 73% | 70% | 12% | 5.63 | 5.44 | |
| Justin Hampson | 32 | NY Mets | 13 | 10.00 | 37 | 13.5% | 10.8% | .222 | 64% | 63% | 0% | 1.80 | 3.83 |
| Doug Slaten | 32 | Pittsburgh | 10 | 13.00 | 55 | 14.5% | 10.9% | .205 | 83% | 50% | 5% | 2.77 | 5.05 |
| Charlie Morton | 29 | Pittsburgh | 9 | 50.33 | 223 | 4.9% | 11.2% | .331 | 66% | 56% | 6% | 4.65 | 4.20 |
| Kip Wells | 35 | San Diego | 7 | 37.33 | 169 | 11.8% | 11.2% | .294 | 73% | 49% | 9% | 4.58 | 5.89 |
| Jorge De La Rosa | 31 | Colorado | 3 | 10.67 | 53 | 3.8% | 11.3% | .308 | 42% | 34% | 17% | 9.28 | 8.66 |
| Enerio Del Rosario | 27 | Houston | 19 | 19.00 | 97 | 7.2% | 11.3% | .446 | 53% | 39% | 2% | 9.00 | 4.07 |
