| 2012 NL Leaders | |||||||||||||
| Name | Age | Team | G | IP | TBF | BB% | K% | BABIP | LOB% | GB% | HR/Air | ERA | FIP |
| Joe Blanton | 32 | Philadelphia | 21 | 133.33 | 560 | 3.2% | 20.5% | .304 | 67% | 43% | 9% | 4.59 | 4.02 |
| Cliff Lee | 34 | Philadelphia | 30 | 211.00 | 847 | 3.3% | 24.4% | .313 | 79% | 46% | 8% | 3.16 | 3.17 |
| Jeff Karstens | 30 | Pittsburgh | 19 | 90.67 | 372 | 4.0% | 17.7% | .295 | 68% | 38% | 4% | 3.97 | 3.35 |
| Bronson Arroyo | 35 | Cincinnati | 32 | 202.00 | 835 | 4.2% | 15.4% | .292 | 77% | 43% | 7% | 3.74 | 4.12 |
| Jeff Francis | 32 | Colorado | 24 | 113.00 | 502 | 4.4% | 15.1% | .358 | 68% | 51% | 8% | 5.58 | 4.30 |
| Kyle Lohse | 34 | St. Louis | 33 | 211.00 | 864 | 4.4% | 16.6% | .270 | 77% | 41% | 5% | 2.86 | 3.54 |
| Jeremy Hefner | NY Mets | 26 | 93.67 | 408 | 4.4% | 15.2% | .325 | 64% | 45% | 5% | 5.09 | 3.69 | |
| Kristopher Medlen | 27 | Atlanta | 50 | 138.00 | 520 | 4.4% | 23.1% | .262 | 85% | 55% | 4% | 1.57 | 2.45 |
| Wade Miley | Arizona | 32 | 194.67 | 807 | 4.6% | 17.8% | .298 | 72% | 44% | 4% | 3.33 | 3.18 | |
| Clayton Richard | 29 | San Diego | 33 | 218.67 | 910 | 4.6% | 11.8% | .276 | 71% | 54% | 9% | 3.99 | 4.65 |
| Marco Estrada | 29 | Milwaukee | 29 | 138.33 | 562 | 5.2% | 25.4% | .307 | 72% | 35% | 7% | 3.64 | 3.38 |
| Jordan Zimmermann | Washington | 32 | 195.67 | 805 | 5.3% | 19.0% | .295 | 79% | 44% | 5% | 2.94 | 3.54 | |
| Mike Leake | Cincinnati | 30 | 179.00 | 757 | 5.4% | 15.3% | .314 | 71% | 49% | 9% | 4.58 | 4.46 | |
| Patrick Corbin | Arizona | 22 | 107.00 | 454 | 5.5% | 18.9% | .326 | 71% | 47% | 8% | 4.54 | 4.03 | |
| Johnny Cueto | 26 | Cincinnati | 33 | 217.00 | 888 | 5.5% | 19.1% | .304 | 79% | 49% | 5% | 2.78 | 3.30 |
| Joe Saunders | 31 | Arizona | 21 | 130.00 | 561 | 5.5% | 15.9% | .312 | 72% | 44% | 7% | 4.22 | 4.22 |
| Zack Greinke | 29 | Milwaukee | 21 | 123.00 | 504 | 5.6% | 24.2% | .328 | 72% | 54% | 4% | 3.44 | 2.57 |
| Roy Halladay | 35 | Philadelphia | 25 | 156.33 | 646 | 5.6% | 20.4% | .309 | 69% | 46% | 7% | 4.49 | 3.72 |
| Wandy Rodriguez | 34 | Houston | 21 | 130.67 | 558 | 5.7% | 15.9% | .293 | 68% | 51% | 6% | 3.79 | 3.84 |
| Madison Bumgarner | 23 | San Francisco | 32 | 208.33 | 849 | 5.8% | 22.5% | .282 | 73% | 48% | 7% | 3.37 | 3.54 |
| Matt Cain | 28 | San Francisco | 32 | 219.33 | 876 | 5.8% | 22.0% | .269 | 79% | 40% | 6% | 2.79 | 3.43 |
| R.A. Dickey | 38 | NY Mets | 34 | 233.67 | 927 | 5.8% | 24.8% | .284 | 80% | 47% | 7% | 2.73 | 3.30 |
| Jaime Garcia | 26 | St. Louis | 20 | 121.67 | 515 | 5.8% | 19.0% | .353 | 69% | 54% | 4% | 3.92 | 3.00 |
| Joshua Collmenter | Arizona | 28 | 90.33 | 375 | 5.9% | 21.3% | .312 | 78% | 40% | 8% | 3.69 | 3.96 | |
| Homer Bailey | 26 | Cincinnati | 33 | 208.00 | 874 | 5.9% | 19.2% | .295 | 73% | 46% | 7% | 3.68 | 4.00 |
| Cole Hamels | 29 | Philadelphia | 31 | 215.33 | 867 | 6.0% | 24.9% | .298 | 78% | 44% | 7% | 3.09 | 3.34 |
| Eric Stults | 33 | San Diego | 18 | 92.33 | 383 | 6.0% | 13.3% | .275 | 74% | 39% | 4% | 3.22 | 3.79 |
| Ian Kennedy | 28 | Arizona | 33 | 208.33 | 899 | 6.1% | 20.8% | .316 | 75% | 38% | 7% | 4.02 | 4.07 |
| Jonathon Niese | 26 | NY Mets | 30 | 190.33 | 788 | 6.2% | 19.7% | .279 | 76% | 49% | 7% | 3.40 | 3.84 |
| Dillon Gee | NY Mets | 17 | 109.67 | 463 | 6.3% | 21.0% | .305 | 69% | 52% | 8% | 4.10 | 3.74 | |
