| 2012 NL Leaders | |||||||||||||
| Name | Age | Team | G | IP | TBF | BB% | K% | BABIP | LOB% | GB% | HR/Air | ERA | FIP |
| Trevor Cahill | 24 | Arizona | 32 | 200.00 | 839 | 8.8% | 18.6% | .297 | 71% | 61% | 7% | 3.78 | 3.88 |
| Lucas Harrell | 27 | Houston | 32 | 193.67 | 827 | 9.4% | 16.9% | .301 | 71% | 58% | 5% | 3.76 | 3.78 |
| A.J. Burnett | 36 | Pittsburgh | 31 | 202.33 | 851 | 7.3% | 21.2% | .301 | 74% | 58% | 7% | 3.51 | 3.56 |
| Jake Westbrook | 35 | St. Louis | 28 | 174.67 | 751 | 6.9% | 14.1% | .318 | 71% | 57% | 5% | 3.92 | 3.84 |
| Kristopher Medlen | 27 | Atlanta | 50 | 138.00 | 520 | 4.4% | 23.1% | .262 | 85% | 55% | 4% | 1.57 | 2.45 |
| Tim Hudson | 37 | Atlanta | 28 | 179.00 | 749 | 6.4% | 13.6% | .279 | 71% | 54% | 4% | 3.62 | 3.81 |
| Alex White | Colorado | 23 | 98.00 | 459 | 11.1% | 13.9% | .324 | 69% | 54% | 9% | 5.51 | 5.26 | |
| Jaime Garcia | 26 | St. Louis | 20 | 121.67 | 515 | 5.8% | 19.0% | .353 | 69% | 54% | 4% | 3.92 | 3.00 |
| Zack Greinke | 29 | Milwaukee | 21 | 123.00 | 504 | 5.6% | 24.2% | .328 | 72% | 54% | 4% | 3.44 | 2.57 |
| Clayton Richard | 29 | San Diego | 33 | 218.67 | 910 | 4.6% | 11.8% | .276 | 71% | 54% | 9% | 3.99 | 4.65 |
| Jordan Lyles | 22 | Houston | 25 | 141.33 | 628 | 6.7% | 15.8% | .310 | 61% | 53% | 9% | 5.09 | 4.56 |
| Dillon Gee | NY Mets | 17 | 109.67 | 463 | 6.3% | 21.0% | .305 | 69% | 52% | 8% | 4.10 | 3.74 | |
| Joe Kelly | St. Louis | 24 | 107.00 | 457 | 7.9% | 16.4% | .310 | 74% | 52% | 6% | 3.53 | 4.03 | |
| Christopher Volstad | 26 | Chi Cubs | 21 | 111.33 | 507 | 8.5% | 12.0% | .330 | 64% | 51% | 8% | 6.31 | 5.14 |
| Jeff Francis | 32 | Colorado | 24 | 113.00 | 502 | 4.4% | 15.1% | .358 | 68% | 51% | 8% | 5.58 | 4.30 |
| Adam Wainwright | 31 | St. Louis | 32 | 198.67 | 831 | 6.3% | 22.1% | .325 | 68% | 51% | 5% | 3.94 | 3.13 |
| Edinson Volquez | 29 | San Diego | 32 | 182.67 | 802 | 13.1% | 21.7% | .301 | 73% | 51% | 6% | 4.09 | 4.09 |
| Kevin Correia | 32 | Pittsburgh | 32 | 171.00 | 728 | 6.3% | 12.2% | .285 | 69% | 51% | 7% | 4.21 | 4.47 |
| Wandy Rodriguez | 34 | Houston | 21 | 130.67 | 558 | 5.7% | 15.9% | .293 | 68% | 51% | 6% | 3.79 | 3.84 |
| Ross Detwiler | 26 | Washington | 33 | 164.33 | 686 | 7.6% | 15.3% | .269 | 71% | 51% | 6% | 3.40 | 4.08 |
| Jason Marquis | 34 | San Diego | 15 | 93.67 | 401 | 7.0% | 19.7% | .297 | 68% | 50% | 10% | 4.04 | 4.31 |
| Paul Maholm | 30 | Chi Cubs | 21 | 120.33 | 503 | 6.8% | 16.1% | .290 | 76% | 50% | 6% | 3.74 | 4.17 |
| Matt Garza | 29 | Chi Cubs | 18 | 103.67 | 424 | 7.5% | 22.6% | .275 | 74% | 50% | 10% | 3.91 | 4.20 |
| Anthony Bass | San Diego | 24 | 97.00 | 411 | 9.5% | 19.5% | .288 | 61% | 50% | 7% | 4.73 | 4.06 | |
| Randall Delgado | 22 | Atlanta | 18 | 92.67 | 401 | 10.5% | 19.0% | .313 | 70% | 50% | 6% | 4.37 | 4.10 |
| Gio Gonzalez | 27 | Washington | 32 | 199.33 | 822 | 9.2% | 25.2% | .276 | 74% | 49% | 3% | 2.89 | 2.86 |
| Mike Leake | Cincinnati | 30 | 179.00 | 757 | 5.4% | 15.3% | .314 | 71% | 49% | 9% | 4.58 | 4.46 | |
| Jonathon Niese | 26 | NY Mets | 30 | 190.33 | 788 | 6.2% | 19.7% | .279 | 76% | 49% | 7% | 3.40 | 3.84 |
| Johnny Cueto | 26 | Cincinnati | 33 | 217.00 | 888 | 5.5% | 19.1% | .304 | 79% | 49% | 5% | 2.78 | 3.30 |
| Madison Bumgarner | 23 | San Francisco | 32 | 208.33 | 849 | 5.8% | 22.5% | .282 | 73% | 48% | 7% | 3.37 | 3.54 |
