| 2009 NL Leaders | |||||||||||||
| Name | Age | Team | G | IP | TBF | BB% | K% | BABIP | LOB% | GB% | HR/Air | ERA | FIP |
| Chris Carpenter | 34 | St. Louis | 28 | 192.67 | 750 | 5.1% | 19.2% | .276 | 79% | 56% | 3% | 2.24 | 2.74 |
| Tim Lincecum | 25 | San Francisco | 32 | 225.33 | 905 | 7.5% | 28.8% | .292 | 76% | 48% | 3% | 2.48 | 2.30 |
| Jair Jurrjens | 24 | Atlanta | 34 | 215.00 | 884 | 8.5% | 17.2% | .276 | 79% | 42% | 4% | 2.60 | 3.64 |
| Adam Wainwright | 28 | St. Louis | 34 | 233.00 | 970 | 6.8% | 21.9% | .303 | 80% | 51% | 5% | 2.63 | 3.08 |
| Clayton Kershaw | 21 | LA Dodgers | 31 | 171.00 | 701 | 13.0% | 26.4% | .279 | 78% | 41% | 3% | 2.79 | 3.04 |
| Javier Vazquez | 33 | Atlanta | 32 | 219.33 | 874 | 5.0% | 27.2% | .291 | 77% | 42% | 6% | 2.87 | 2.73 |
| Matt Cain | 25 | San Francisco | 33 | 217.67 | 886 | 8.2% | 19.3% | .272 | 82% | 41% | 6% | 2.89 | 3.85 |
| Thomas Hanson | 23 | Atlanta | 21 | 127.67 | 522 | 8.8% | 22.2% | .279 | 80% | 40% | 5% | 2.89 | 3.46 |
| J.A. Happ | 27 | Philadelphia | 35 | 166.00 | 685 | 8.2% | 17.4% | .274 | 85% | 40% | 7% | 2.93 | 4.28 |
| Wandy Rodriguez | 30 | Houston | 33 | 205.67 | 849 | 7.4% | 22.7% | .310 | 79% | 46% | 7% | 3.02 | 3.50 |
| Ted Lilly | 34 | Chi Cubs | 27 | 177.00 | 706 | 5.1% | 21.4% | .267 | 78% | 35% | 7% | 3.10 | 3.61 |
| Johan Santana | 30 | NY Mets | 25 | 166.67 | 701 | 6.6% | 20.8% | .288 | 78% | 38% | 6% | 3.13 | 3.75 |
| Dan Haren | 29 | Arizona | 34 | 232.33 | 922 | 4.1% | 24.6% | .274 | 77% | 45% | 8% | 3.14 | 3.16 |
| Randy Wells | 27 | Chi Cubs | 27 | 165.33 | 694 | 6.6% | 15.0% | .298 | 76% | 48% | 5% | 3.16 | 3.85 |
| Josh Johnson | 26 | Florida | 33 | 209.00 | 855 | 6.8% | 22.3% | .300 | 75% | 50% | 5% | 3.23 | 3.02 |
| Randy Wolf | 33 | LA Dodgers | 34 | 214.33 | 862 | 6.7% | 18.6% | .259 | 77% | 41% | 6% | 3.36 | 3.92 |
| Ubaldo Jimenez | 26 | Colorado | 33 | 218.00 | 914 | 9.3% | 21.7% | .292 | 74% | 54% | 5% | 3.47 | 3.33 |
| Joel Pineiro | 31 | St. Louis | 32 | 214.00 | 865 | 3.1% | 12.1% | .297 | 67% | 60% | 4% | 3.49 | 3.24 |
| Ryan Dempster | 32 | Chi Cubs | 31 | 200.00 | 842 | 7.7% | 20.4% | .314 | 73% | 48% | 7% | 3.65 | 3.83 |
| Yovani Gallardo | 23 | Milwaukee | 30 | 185.67 | 793 | 11.9% | 25.7% | .283 | 78% | 47% | 8% | 3.73 | 3.93 |
| Hiroki Kuroda | 34 | LA Dodgers | 21 | 117.33 | 485 | 4.9% | 17.9% | .278 | 64% | 51% | 7% | 3.76 | 3.54 |
| Carlos Zambrano | 28 | Chi Cubs | 28 | 169.33 | 733 | 10.6% | 20.7% | .313 | 72% | 45% | 4% | 3.77 | 3.57 |
| Bronson Arroyo | 32 | Cincinnati | 33 | 220.33 | 923 | 7.0% | 13.8% | .273 | 76% | 46% | 8% | 3.84 | 4.74 |
| Kenshin Kawakami | 34 | Atlanta | 32 | 156.33 | 669 | 8.5% | 15.7% | .298 | 73% | 41% | 5% | 3.86 | 4.17 |
| John Lannan | 25 | Washington | 33 | 206.33 | 875 | 7.8% | 10.2% | .278 | 72% | 54% | 7% | 3.88 | 4.61 |
| Kevin Correia | 29 | San Diego | 33 | 198.00 | 830 | 7.7% | 17.1% | .302 | 71% | 46% | 5% | 3.91 | 3.77 |
| Ross Ohlendorf | 27 | Pittsburgh | 29 | 176.67 | 725 | 7.3% | 15.0% | .274 | 76% | 42% | 8% | 3.92 | 4.68 |
| Edward Mujica | 25 | San Diego | 67 | 93.67 | 393 | 4.8% | 19.3% | .315 | 73% | 40% | 8% | 3.94 | 3.99 |
| Chad Billingsley | 25 | LA Dodgers | 33 | 196.33 | 823 | 10.4% | 21.7% | .306 | 71% | 48% | 6% | 4.03 | 3.78 |
| Doug Davis | 34 | Arizona | 34 | 203.33 | 889 | 11.6% | 16.4% | .301 | 76% | 44% | 7% | 4.03 | 4.80 |
