| 2012 NL Leaders | |||||||||||||
| Name | Age | Team | G | IP | TBF | BB% | K% | BABIP | LOB% | GB% | HR/Air | ERA | FIP |
| Chris Young | 33 | NY Mets | 20 | 115.00 | 493 | 7.3% | 16.2% | .301 | 74% | 24% | 6% | 4.15 | 4.54 |
| Michael Fiers | Milwaukee | 23 | 127.67 | 539 | 6.7% | 25.0% | .325 | 73% | 34% | 5% | 3.74 | 3.13 | |
| Marco Estrada | 29 | Milwaukee | 29 | 138.33 | 562 | 5.2% | 25.4% | .307 | 72% | 35% | 7% | 3.64 | 3.38 |
| Johan Santana | 33 | NY Mets | 21 | 117.00 | 499 | 7.8% | 22.2% | .308 | 69% | 35% | 8% | 4.85 | 4.12 |
| Shaun Marcum | 31 | Milwaukee | 21 | 124.00 | 527 | 7.8% | 20.7% | .288 | 75% | 36% | 7% | 3.70 | 4.14 |
| Mike Minor | Atlanta | 30 | 179.33 | 728 | 7.7% | 19.9% | .263 | 71% | 37% | 8% | 4.12 | 4.42 | |
| Travis Wood | 25 | Chi Cubs | 26 | 156.00 | 649 | 8.3% | 18.3% | .252 | 72% | 37% | 9% | 4.27 | 4.88 |
| Ian Kennedy | 28 | Arizona | 33 | 208.33 | 899 | 6.1% | 20.8% | .316 | 75% | 38% | 7% | 4.02 | 4.07 |
| Jeff Karstens | 30 | Pittsburgh | 19 | 90.67 | 372 | 4.0% | 17.7% | .295 | 68% | 38% | 4% | 3.97 | 3.35 |
| Bud Norris | 27 | Houston | 29 | 168.33 | 733 | 9.0% | 22.5% | .308 | 72% | 39% | 8% | 4.71 | 4.26 |
| Aaron Harang | 34 | LA Dodgers | 31 | 179.67 | 786 | 10.8% | 16.7% | .292 | 72% | 39% | 4% | 3.76 | 4.17 |
| Eric Stults | 33 | San Diego | 18 | 92.33 | 383 | 6.0% | 13.3% | .275 | 74% | 39% | 4% | 3.22 | 3.79 |
| Matt Cain | 28 | San Francisco | 32 | 219.33 | 876 | 5.8% | 22.0% | .269 | 79% | 40% | 6% | 2.79 | 3.43 |
| James McDonald | 28 | Pittsburgh | 30 | 171.00 | 713 | 9.7% | 21.2% | .278 | 71% | 40% | 7% | 4.21 | 4.24 |
| Thomas Hanson | 26 | Atlanta | 31 | 174.67 | 761 | 9.3% | 21.2% | .324 | 74% | 40% | 9% | 4.48 | 4.60 |
| Joshua Collmenter | Arizona | 28 | 90.33 | 375 | 5.9% | 21.3% | .312 | 78% | 40% | 8% | 3.69 | 3.96 | |
| Chris Capuano | 34 | LA Dodgers | 33 | 198.33 | 817 | 6.6% | 19.8% | .293 | 73% | 41% | 7% | 3.63 | 3.98 |
| Kyle Lohse | 34 | St. Louis | 33 | 211.00 | 864 | 4.4% | 16.6% | .270 | 77% | 41% | 5% | 2.86 | 3.54 |
| Barry Zito | 34 | San Francisco | 32 | 184.33 | 799 | 8.8% | 14.3% | .292 | 73% | 42% | 6% | 4.15 | 4.52 |
| Drew Pomeranz | Colorado | 22 | 96.67 | 434 | 10.6% | 19.1% | .304 | 71% | 42% | 8% | 4.93 | 4.84 | |
| Joe Blanton | 32 | Philadelphia | 21 | 133.33 | 560 | 3.2% | 20.5% | .304 | 67% | 43% | 9% | 4.59 | 4.02 |
| Bronson Arroyo | 35 | Cincinnati | 32 | 202.00 | 835 | 4.2% | 15.4% | .292 | 77% | 43% | 7% | 3.74 | 4.12 |
| Ryan Vogelsong | 35 | San Francisco | 31 | 189.67 | 788 | 7.9% | 20.1% | .293 | 76% | 43% | 5% | 3.37 | 3.73 |
| Stephen Strasburg | Washington | 28 | 159.33 | 653 | 7.4% | 30.2% | .320 | 75% | 43% | 7% | 3.16 | 2.86 | |
| Ryan Dempster | 35 | Chi Cubs | 16 | 104.00 | 417 | 6.5% | 19.9% | .241 | 84% | 43% | 5% | 2.25 | 3.46 |
| Jeremy Guthrie | 33 | Colorado | 19 | 90.67 | 422 | 7.3% | 10.7% | .328 | 67% | 43% | 11% | 6.35 | 6.40 |
| Jordan Zimmermann | Washington | 32 | 195.67 | 805 | 5.3% | 19.0% | .295 | 79% | 44% | 5% | 2.94 | 3.54 | |
| Cole Hamels | 29 | Philadelphia | 31 | 215.33 | 867 | 6.0% | 24.9% | .298 | 78% | 44% | 7% | 3.09 | 3.34 |
| Joe Saunders | 31 | Arizona | 21 | 130.00 | 561 | 5.5% | 15.9% | .312 | 72% | 44% | 7% | 4.22 | 4.22 |
| Wade Miley | Arizona | 32 | 194.67 | 807 | 4.6% | 17.8% | .298 | 72% | 44% | 4% | 3.33 | 3.18 | |
