| 2012 NL Leaders | |||||||||||||
| Name | Age | Team | G | IP | TBF | BB% | K% | BABIP | LOB% | GB% | HR/Air | ERA | FIP |
| Kristopher Medlen | 27 | Atlanta | 50 | 138.00 | 520 | 4.4% | 23.1% | .262 | 85% | 55% | 4% | 1.57 | 2.45 |
| Zack Greinke | 29 | Milwaukee | 21 | 123.00 | 504 | 5.6% | 24.2% | .328 | 72% | 54% | 4% | 3.44 | 2.57 |
| Gio Gonzalez | 27 | Washington | 32 | 199.33 | 822 | 9.2% | 25.2% | .276 | 74% | 49% | 3% | 2.89 | 2.86 |
| Stephen Strasburg | Washington | 28 | 159.33 | 653 | 7.4% | 30.2% | .320 | 75% | 43% | 7% | 3.16 | 2.86 | |
| Clayton Kershaw | 24 | LA Dodgers | 33 | 227.67 | 901 | 7.0% | 25.4% | .275 | 78% | 47% | 5% | 2.53 | 2.93 |
| Jaime Garcia | 26 | St. Louis | 20 | 121.67 | 515 | 5.8% | 19.0% | .353 | 69% | 54% | 4% | 3.92 | 3.00 |
| Adam Wainwright | 31 | St. Louis | 32 | 198.67 | 831 | 6.3% | 22.1% | .325 | 68% | 51% | 5% | 3.94 | 3.13 |
| Michael Fiers | Milwaukee | 23 | 127.67 | 539 | 6.7% | 25.0% | .325 | 73% | 34% | 5% | 3.74 | 3.13 | |
| Cliff Lee | 34 | Philadelphia | 30 | 211.00 | 847 | 3.3% | 24.4% | .313 | 79% | 46% | 8% | 3.16 | 3.17 |
| Wade Miley | Arizona | 32 | 194.67 | 807 | 4.6% | 17.8% | .298 | 72% | 44% | 4% | 3.33 | 3.18 | |
| R.A. Dickey | 38 | NY Mets | 34 | 233.67 | 927 | 5.8% | 24.8% | .284 | 80% | 47% | 7% | 2.73 | 3.30 |
| Johnny Cueto | 26 | Cincinnati | 33 | 217.00 | 888 | 5.5% | 19.1% | .304 | 79% | 49% | 5% | 2.78 | 3.30 |
| Cole Hamels | 29 | Philadelphia | 31 | 215.33 | 867 | 6.0% | 24.9% | .298 | 78% | 44% | 7% | 3.09 | 3.34 |
| Jeff Karstens | 30 | Pittsburgh | 19 | 90.67 | 372 | 4.0% | 17.7% | .295 | 68% | 38% | 4% | 3.97 | 3.35 |
| Chad Billingsley | 28 | LA Dodgers | 25 | 149.67 | 634 | 7.1% | 20.2% | .316 | 72% | 47% | 5% | 3.55 | 3.37 |
| Marco Estrada | 29 | Milwaukee | 29 | 138.33 | 562 | 5.2% | 25.4% | .307 | 72% | 35% | 7% | 3.64 | 3.38 |
| Matt Cain | 28 | San Francisco | 32 | 219.33 | 876 | 5.8% | 22.0% | .269 | 79% | 40% | 6% | 2.79 | 3.43 |
| Ryan Dempster | 35 | Chi Cubs | 16 | 104.00 | 417 | 6.5% | 19.9% | .241 | 84% | 43% | 5% | 2.25 | 3.46 |
| Lance Lynn | 25 | St. Louis | 35 | 176.00 | 744 | 8.6% | 24.2% | .328 | 76% | 46% | 6% | 3.78 | 3.53 |
| Jordan Zimmermann | Washington | 32 | 195.67 | 805 | 5.3% | 19.0% | .295 | 79% | 44% | 5% | 2.94 | 3.54 | |
| Madison Bumgarner | 23 | San Francisco | 32 | 208.33 | 849 | 5.8% | 22.5% | .282 | 73% | 48% | 7% | 3.37 | 3.54 |
| Kyle Lohse | 34 | St. Louis | 33 | 211.00 | 864 | 4.4% | 16.6% | .270 | 77% | 41% | 5% | 2.86 | 3.54 |
| A.J. Burnett | 36 | Pittsburgh | 31 | 202.33 | 851 | 7.3% | 21.2% | .301 | 74% | 58% | 7% | 3.51 | 3.56 |
| Jeff Samardzija | 28 | Chi Cubs | 28 | 174.67 | 723 | 7.7% | 24.9% | .303 | 73% | 45% | 8% | 3.81 | 3.59 |
| Jeremy Hefner | NY Mets | 26 | 93.67 | 408 | 4.4% | 15.2% | .325 | 64% | 45% | 5% | 5.09 | 3.69 | |
| Roy Halladay | 35 | Philadelphia | 25 | 156.33 | 646 | 5.6% | 20.4% | .309 | 69% | 46% | 7% | 4.49 | 3.72 |
| Ryan Vogelsong | 35 | San Francisco | 31 | 189.67 | 788 | 7.9% | 20.1% | .293 | 76% | 43% | 5% | 3.37 | 3.73 |
| Dillon Gee | NY Mets | 17 | 109.67 | 463 | 6.3% | 21.0% | .305 | 69% | 52% | 8% | 4.10 | 3.74 | |
| Lucas Harrell | 27 | Houston | 32 | 193.67 | 827 | 9.4% | 16.9% | .301 | 71% | 58% | 5% | 3.76 | 3.78 |
| Eric Stults | 33 | San Diego | 18 | 92.33 | 383 | 6.0% | 13.3% | .275 | 74% | 39% | 4% | 3.22 | 3.79 |
