| 2012 NL Leaders | |||||||||||||
| Name | Age | Team | G | IP | TBF | BB% | K% | BABIP | LOB% | GB% | HR/Air | ERA | FIP |
| Tim Stauffer | 30 | San Diego | 1 | 5.00 | 24 | 12.5% | 20.8% | .400 | 70% | 60% | 16% | 5.40 | 5.53 |
| Aneury Rodriguez | 25 | Houston | 1 | 6.00 | 22 | 9.1% | 27.3% | .0 | 167% | 21% | 18% | 3.00 | 6.46 |
| Yusmeiro Petit | 28 | San Francisco | 1 | 4.67 | 22 | 18.2% | 4.5% | .438 | 82% | 35% | 0% | 3.85 | 5.27 |
| Dustin Moseley | 31 | San Diego | 1 | 5.00 | 22 | 9.1% | 18.2% | .286 | 36% | 53% | 13% | 9.00 | 5.33 |
| Todd Redmond | 27 | Cincinnati | 1 | 3.33 | 22 | 22.7% | 9.1% | .429 | 75% | 33% | 10% | 10.81 | 10.33 |
| John Ely | LA Dodgers | 2 | 2.67 | 19 | 21.1% | 15.8% | .750 | 45% | 55% | 0% | 20.22 | 6.50 | |
| Charles Fick | St. Louis | 2 | 1.67 | 9 | 11.1% | 0.0% | .429 | 75% | 0% | 0% | 5.39 | 4.92 | |
| Julio Teheran | 22 | Atlanta | 2 | 6.33 | 24 | 4.2% | 20.8% | .278 | 33% | 24% | 0% | 5.69 | 2.02 |
| Brian Wilson | 30 | San Francisco | 2 | 2.00 | 12 | 16.7% | 16.7% | .500 | 67% | 29% | 0% | 9.00 | 4.13 |
| Zach Putnam | 25 | Colorado | 2 | 2.00 | 9 | 11.1% | 0.0% | .429 | 100% | 38% | 0% | 0.00 | 4.63 |
| Chris Narveson | 31 | Milwaukee | 2 | 9.00 | 41 | 9.8% | 12.2% | .296 | 54% | 35% | 10% | 7.00 | 6.24 |
| Edwar Cabrera | 25 | Colorado | 2 | 5.67 | 33 | 21.2% | 15.2% | .353 | 59% | 43% | 26% | 11.11 | 11.95 |
| Christopher Schwinden | 26 | NY Mets | 3 | 8.67 | 46 | 6.5% | 2.2% | .297 | 40% | 50% | 19% | 12.46 | 9.93 |
| Kyle Weiland | Houston | 3 | 17.67 | 79 | 8.9% | 16.5% | .352 | 75% | 43% | 15% | 6.62 | 6.52 | |
| Jonathan Albaladejo | 30 | Arizona | 3 | 3.00 | 15 | 0.0% | 13.3% | .400 | 65% | 25% | 11% | 9.00 | 7.13 |
| Jorge De La Rosa | 31 | Colorado | 3 | 10.67 | 53 | 3.8% | 11.3% | .308 | 42% | 34% | 17% | 9.28 | 8.66 |
| Tony Cingrani | Cincinnati | 3 | 5.00 | 22 | 9.1% | 40.9% | .300 | 109% | 60% | 23% | 1.80 | 3.33 | |
| Matt Palmer | 33 | San Diego | 3 | 2.00 | 10 | 20.0% | 20.0% | .250 | 77% | 33% | 25% | 9.00 | 10.63 |
| Chris Carpenter | 37 | St. Louis | 3 | 17.00 | 72 | 4.2% | 16.7% | .269 | 77% | 42% | 6% | 3.71 | 4.13 |
| Jonathan Sanchez | 30 | Colorado | 3 | 11.33 | 57 | 15.8% | 15.8% | .424 | 60% | 34% | 12% | 9.53 | 7.36 |
| Mike Pelfrey | 28 | NY Mets | 3 | 19.67 | 85 | 4.7% | 15.3% | .358 | 82% | 53% | 0% | 2.29 | 2.42 |
| Travis Blackley | 30 | San Francisco | 4 | 5.00 | 25 | 8.0% | 8.0% | .350 | 33% | 43% | 0% | 9.00 | 3.53 |
| D.J. Carrasco | NY Mets | 4 | 3.67 | 18 | 0.0% | 16.7% | .333 | 95% | 38% | 23% | 7.36 | 9.39 | |
| Trevor Bauer | Arizona | 4 | 16.33 | 77 | 16.9% | 22.1% | .286 | 60% | 47% | 8% | 6.06 | 5.21 | |
| Brandon Dickson | 28 | St. Louis | 4 | 6.33 | 32 | 6.3% | 18.8% | .364 | 54% | 52% | 17% | 7.11 | 6.29 |
| Eric Hacker | 29 | San Francisco | 4 | 9.67 | 45 | 4.4% | 17.8% | .387 | 77% | 44% | 11% | 5.58 | 5.09 |
| Rodrigo Lopez | 37 | Chi Cubs | 4 | 6.33 | 34 | 14.7% | 5.9% | .320 | 57% | 27% | 0% | 5.69 | 5.34 |
| Jason Berken | 29 | Chi Cubs | 4 | 18.67 | 85 | 7.1% | 12.9% | .323 | 62% | 48% | 9% | 4.82 | 5.16 |
| Rick Vanden Hurk | Pittsburgh | 4 | 2.67 | 16 | 6.3% | 18.8% | .455 | 43% | 55% | 0% | 13.48 | 3.13 | |
| Joseph Wieland | San Diego | 5 | 27.67 | 119 | 7.6% | 20.2% | .280 | 69% | 42% | 10% | 4.55 | 4.83 | |
