| 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 | |
| Brian Wilson | 30 | San Francisco | 2 | 2.00 | 12 | 16.7% | 16.7% | .500 | 67% | 29% | 0% | 9.00 | 4.13 |
| Matt Palmer | 33 | San Diego | 3 | 2.00 | 10 | 20.0% | 20.0% | .250 | 77% | 33% | 25% | 9.00 | 10.63 |
| Zach Putnam | 25 | Colorado | 2 | 2.00 | 9 | 11.1% | 0.0% | .429 | 100% | 38% | 0% | 0.00 | 4.63 |
| John Ely | LA Dodgers | 2 | 2.67 | 19 | 21.1% | 15.8% | .750 | 45% | 55% | 0% | 20.22 | 6.50 | |
| Rick Vanden Hurk | Pittsburgh | 4 | 2.67 | 16 | 6.3% | 18.8% | .455 | 43% | 55% | 0% | 13.48 | 3.13 | |
| Joseph Paterson | Arizona | 6 | 2.67 | 26 | 11.5% | 0.0% | .619 | 46% | 57% | 20% | 37.08 | 16.24 | |
| Jonathan Albaladejo | 30 | Arizona | 3 | 3.00 | 15 | 0.0% | 13.3% | .400 | 65% | 25% | 11% | 9.00 | 7.13 |
| Todd Redmond | 27 | Cincinnati | 1 | 3.33 | 22 | 22.7% | 9.1% | .429 | 75% | 33% | 10% | 10.81 | 10.33 |
| D.J. Carrasco | NY Mets | 4 | 3.67 | 18 | 0.0% | 16.7% | .333 | 95% | 38% | 23% | 7.36 | 9.39 | |
| Daniel Runzler | San Francisco | 6 | 3.67 | 15 | 20.0% | 33.3% | .250 | 100% | 33% | 0% | 0.00 | 3.67 | |
| Pedro Beato | 26 | NY Mets | 7 | 4.33 | 20 | 10.0% | 25.0% | .333 | 36% | 29% | 11% | 10.39 | 5.21 |
| Yusmeiro Petit | 28 | San Francisco | 1 | 4.67 | 22 | 18.2% | 4.5% | .438 | 82% | 35% | 0% | 3.85 | 5.27 |
| Justin Wilson | 25 | Pittsburgh | 8 | 4.67 | 26 | 11.5% | 26.9% | .667 | 92% | 19% | 0% | 1.93 | 2.06 |
| Travis Blackley | 30 | San Francisco | 4 | 5.00 | 25 | 8.0% | 8.0% | .350 | 33% | 43% | 0% | 9.00 | 3.53 |
| Tim Stauffer | 30 | San Diego | 1 | 5.00 | 24 | 12.5% | 20.8% | .400 | 70% | 60% | 16% | 5.40 | 5.53 |
| Tony Cingrani | Cincinnati | 3 | 5.00 | 22 | 9.1% | 40.9% | .300 | 109% | 60% | 23% | 1.80 | 3.33 | |
| Dustin Moseley | 31 | San Diego | 1 | 5.00 | 22 | 9.1% | 18.2% | .286 | 36% | 53% | 13% | 9.00 | 5.33 |
| Francisco Cordero | 37 | Houston | 6 | 5.00 | 32 | 12.5% | 15.6% | .579 | 46% | 41% | 16% | 19.80 | 9.33 |
| Brian Fuentes | 37 | St. Louis | 6 | 5.00 | 26 | 19.2% | 23.1% | .385 | 62% | 40% | 11% | 9.00 | 6.33 |
| Peter Moylan | 34 | Atlanta | 8 | 5.00 | 21 | 9.5% | 9.5% | .133 | 56% | 50% | 12% | 1.80 | 6.13 |
| Bryan Morris | 25 | Pittsburgh | 5 | 5.00 | 20 | 10.0% | 30.0% | .200 | 60% | 73% | 0% | 1.80 | 2.53 |
| Mike MacDougal | 35 | LA Dodgers | 7 | 5.67 | 32 | 18.8% | 12.5% | .409 | 67% | 37% | 0% | 7.94 | 4.89 |
| Michael Stutes | 26 | Philadelphia | 6 | 5.67 | 29 | 13.8% | 17.2% | .350 | 45% | 20% | 0% | 6.35 | 3.48 |
| Josh Wall | 26 | LA Dodgers | 7 | 5.67 | 21 | 4.8% | 19.0% | .143 | 56% | 40% | 11% | 4.76 | 5.07 |
| Edwar Cabrera | 25 | Colorado | 2 | 5.67 | 33 | 21.2% | 15.2% | .353 | 59% | 43% | 26% | 11.11 | 11.95 |
| Aneury Rodriguez | 25 | Houston | 1 | 6.00 | 22 | 9.1% | 27.3% | .0 | 167% | 21% | 18% | 3.00 | 6.46 |
| Miguel Socolovich R. | 26 | Chi Cubs | 6 | 6.00 | 25 | 12.0% | 24.0% | .200 | 71% | 31% | 9% | 4.50 | 4.79 |
| Blake Parker | 27 | Chi Cubs | 7 | 6.00 | 32 | 15.6% | 18.8% | .412 | 74% | 40% | 25% | 6.00 | 10.13 |
| Miguel Batista | 41 | Atlanta | 5 | 6.00 | 24 | 8.3% | 8.3% | .222 | 89% | 42% | 9% | 3.00 | 5.63 |
