| 2012 NL Leaders | |||||||||||||
| Name | Age | Team | G | IP | TBF | BB% | K% | BABIP | LOB% | GB% | HR/Air | ERA | FIP |
| Jordan Lyles | 22 | Houston | 25 | 141.33 | 628 | 6.7% | 15.8% | .310 | 61% | 53% | 9% | 5.09 | 4.56 |
| Anthony Bass | San Diego | 24 | 97.00 | 411 | 9.5% | 19.5% | .288 | 61% | 50% | 7% | 4.73 | 4.06 | |
| Christopher Volstad | 26 | Chi Cubs | 21 | 111.33 | 507 | 8.5% | 12.0% | .330 | 64% | 51% | 8% | 6.31 | 5.14 |
| Jeremy Hefner | NY Mets | 26 | 93.67 | 408 | 4.4% | 15.2% | .325 | 64% | 45% | 5% | 5.09 | 3.69 | |
| Erik Bedard | 33 | Pittsburgh | 24 | 125.67 | 557 | 10.1% | 21.2% | .322 | 67% | 45% | 7% | 5.01 | 4.11 |
| Jeremy Guthrie | 33 | Colorado | 19 | 90.67 | 422 | 7.3% | 10.7% | .328 | 67% | 43% | 11% | 6.35 | 6.40 |
| Joe Blanton | 32 | Philadelphia | 21 | 133.33 | 560 | 3.2% | 20.5% | .304 | 67% | 43% | 9% | 4.59 | 4.02 |
| Wandy Rodriguez | 34 | Houston | 21 | 130.67 | 558 | 5.7% | 15.9% | .293 | 68% | 51% | 6% | 3.79 | 3.84 |
| Jason Marquis | 34 | San Diego | 15 | 93.67 | 401 | 7.0% | 19.7% | .297 | 68% | 50% | 10% | 4.04 | 4.31 |
| 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 |
| Randy Wolf | 36 | Milwaukee | 25 | 142.33 | 633 | 7.1% | 15.2% | .349 | 68% | 45% | 8% | 5.69 | 4.77 |
| Jeff Karstens | 30 | Pittsburgh | 19 | 90.67 | 372 | 4.0% | 17.7% | .295 | 68% | 38% | 4% | 3.97 | 3.35 |
| Tim Lincecum | 28 | San Francisco | 33 | 186.00 | 825 | 10.9% | 23.0% | .321 | 68% | 45% | 8% | 5.18 | 4.21 |
| Roy Halladay | 35 | Philadelphia | 25 | 156.33 | 646 | 5.6% | 20.4% | .309 | 69% | 46% | 7% | 4.49 | 3.72 |
| Dillon Gee | NY Mets | 17 | 109.67 | 463 | 6.3% | 21.0% | .305 | 69% | 52% | 8% | 4.10 | 3.74 | |
| Kevin Correia | 32 | Pittsburgh | 32 | 171.00 | 728 | 6.3% | 12.2% | .285 | 69% | 51% | 7% | 4.21 | 4.47 |
| 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 |
| Johan Santana | 33 | NY Mets | 21 | 117.00 | 499 | 7.8% | 22.2% | .308 | 69% | 35% | 8% | 4.85 | 4.12 |
| Randall Delgado | 22 | Atlanta | 18 | 92.67 | 401 | 10.5% | 19.0% | .313 | 70% | 50% | 6% | 4.37 | 4.10 |
| Trevor Cahill | 24 | Arizona | 32 | 200.00 | 839 | 8.8% | 18.6% | .297 | 71% | 61% | 7% | 3.78 | 3.88 |
| Drew Pomeranz | Colorado | 22 | 96.67 | 434 | 10.6% | 19.1% | .304 | 71% | 42% | 8% | 4.93 | 4.84 | |
| Ross Detwiler | 26 | Washington | 33 | 164.33 | 686 | 7.6% | 15.3% | .269 | 71% | 51% | 6% | 3.40 | 4.08 |
| Edwin Jackson | 29 | Washington | 31 | 189.67 | 790 | 7.3% | 21.3% | .290 | 71% | 47% | 8% | 4.03 | 3.88 |
| Clayton Richard | 29 | San Diego | 33 | 218.67 | 910 | 4.6% | 11.8% | .276 | 71% | 54% | 9% | 3.99 | 4.65 |
| Lucas Harrell | 27 | Houston | 32 | 193.67 | 827 | 9.4% | 16.9% | .301 | 71% | 58% | 5% | 3.76 | 3.78 |
| Tim Hudson | 37 | Atlanta | 28 | 179.00 | 749 | 6.4% | 13.6% | .279 | 71% | 54% | 4% | 3.62 | 3.81 |
| Jake Westbrook | 35 | St. Louis | 28 | 174.67 | 751 | 6.9% | 14.1% | .318 | 71% | 57% | 5% | 3.92 | 3.84 |
| Mike Leake | Cincinnati | 30 | 179.00 | 757 | 5.4% | 15.3% | .314 | 71% | 49% | 9% | 4.58 | 4.46 | |
