| 2012 NL Leaders | |||||||||||||
| Name | Age | Team | G | IP | TBF | BB% | K% | BABIP | LOB% | GB% | HR/Air | ERA | FIP |
| Edinson Volquez | 29 | San Diego | 32 | 182.67 | 802 | 13.1% | 21.7% | .301 | 73% | 51% | 6% | 4.09 | 4.09 |
| Alex White | Colorado | 23 | 98.00 | 459 | 11.1% | 13.9% | .324 | 69% | 54% | 9% | 5.51 | 5.26 | |
| Tim Lincecum | 28 | San Francisco | 33 | 186.00 | 825 | 10.9% | 23.0% | .321 | 68% | 45% | 8% | 5.18 | 4.21 |
| Aaron Harang | 34 | LA Dodgers | 31 | 179.67 | 786 | 10.8% | 16.7% | .292 | 72% | 39% | 4% | 3.76 | 4.17 |
| Drew Pomeranz | Colorado | 22 | 96.67 | 434 | 10.6% | 19.1% | .304 | 71% | 42% | 8% | 4.93 | 4.84 | |
| Randall Delgado | 22 | Atlanta | 18 | 92.67 | 401 | 10.5% | 19.0% | .313 | 70% | 50% | 6% | 4.37 | 4.10 |
| Erik Bedard | 33 | Pittsburgh | 24 | 125.67 | 557 | 10.1% | 21.2% | .322 | 67% | 45% | 7% | 5.01 | 4.11 |
| James McDonald | 28 | Pittsburgh | 30 | 171.00 | 713 | 9.7% | 21.2% | .278 | 71% | 40% | 7% | 4.21 | 4.24 |
| Anthony Bass | San Diego | 24 | 97.00 | 411 | 9.5% | 19.5% | .288 | 61% | 50% | 7% | 4.73 | 4.06 | |
| Lucas Harrell | 27 | Houston | 32 | 193.67 | 827 | 9.4% | 16.9% | .301 | 71% | 58% | 5% | 3.76 | 3.78 |
| Yovani Gallardo | 26 | Milwaukee | 33 | 204.00 | 860 | 9.4% | 23.7% | .301 | 78% | 47% | 9% | 3.66 | 3.98 |
| Thomas Hanson | 26 | Atlanta | 31 | 174.67 | 761 | 9.3% | 21.2% | .324 | 74% | 40% | 9% | 4.48 | 4.60 |
| Gio Gonzalez | 27 | Washington | 32 | 199.33 | 822 | 9.2% | 25.2% | .276 | 74% | 49% | 3% | 2.89 | 2.86 |
| Bud Norris | 27 | Houston | 29 | 168.33 | 733 | 9.0% | 22.5% | .308 | 72% | 39% | 8% | 4.71 | 4.26 |
| Trevor Cahill | 24 | Arizona | 32 | 200.00 | 839 | 8.8% | 18.6% | .297 | 71% | 61% | 7% | 3.78 | 3.88 |
| Barry Zito | 34 | San Francisco | 32 | 184.33 | 799 | 8.8% | 14.3% | .292 | 73% | 42% | 6% | 4.15 | 4.52 |
| Lance Lynn | 25 | St. Louis | 35 | 176.00 | 744 | 8.6% | 24.2% | .328 | 76% | 46% | 6% | 3.78 | 3.53 |
| J.A. Happ | 30 | Houston | 18 | 104.33 | 457 | 8.5% | 21.4% | .324 | 73% | 46% | 10% | 4.83 | 4.52 |
| Christopher Volstad | 26 | Chi Cubs | 21 | 111.33 | 507 | 8.5% | 12.0% | .330 | 64% | 51% | 8% | 6.31 | 5.14 |
| Travis Wood | 25 | Chi Cubs | 26 | 156.00 | 649 | 8.3% | 18.3% | .252 | 72% | 37% | 9% | 4.27 | 4.88 |
| Vance Worley | 25 | Philadelphia | 23 | 133.00 | 590 | 8.0% | 18.1% | .358 | 73% | 45% | 5% | 4.26 | 3.89 |
| Joe Kelly | St. Louis | 24 | 107.00 | 457 | 7.9% | 16.4% | .310 | 74% | 52% | 6% | 3.53 | 4.03 | |
| Ryan Vogelsong | 35 | San Francisco | 31 | 189.67 | 788 | 7.9% | 20.1% | .293 | 76% | 43% | 5% | 3.37 | 3.73 |
| 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 |
| Jeff Samardzija | 28 | Chi Cubs | 28 | 174.67 | 723 | 7.7% | 24.9% | .303 | 73% | 45% | 8% | 3.81 | 3.59 |
| Mike Minor | Atlanta | 30 | 179.33 | 728 | 7.7% | 19.9% | .263 | 71% | 37% | 8% | 4.12 | 4.42 | |
| Ross Detwiler | 26 | Washington | 33 | 164.33 | 686 | 7.6% | 15.3% | .269 | 71% | 51% | 6% | 3.40 | 4.08 |
| Matt Garza | 29 | Chi Cubs | 18 | 103.67 | 424 | 7.5% | 22.6% | .275 | 74% | 50% | 10% | 3.91 | 4.20 |
| Matthew Latos | 25 | Cincinnati | 33 | 209.33 | 858 | 7.5% | 21.6% | .275 | 75% | 46% | 8% | 3.48 | 3.89 |
