| 2009 NL Leaders | |||||||||||||||||
| Name | Age | Team | G | W | L | IP | TBF | H | 2B | 3B | HR | R | ER | BB | SO | ERA | RA9 |
| Chris Carpenter | 34 | St. Louis | 28 | 17 | 4 | 192.2 | 750 | 156 | 29 | 4 | 7 | 49 | 48 | 38 | 144 | 2.24 | 2.29 |
| Tim Lincecum | 25 | San Francisco | 32 | 15 | 7 | 225.1 | 905 | 168 | 31 | 3 | 10 | 69 | 62 | 68 | 261 | 2.48 | 2.76 |
| Jair Jurrjens | 24 | Atlanta | 34 | 14 | 10 | 215.0 | 884 | 186 | 39 | 5 | 15 | 71 | 62 | 75 | 152 | 2.60 | 2.97 |
| Adam Wainwright | 28 | St. Louis | 34 | 19 | 8 | 233.0 | 970 | 216 | 38 | 2 | 17 | 75 | 68 | 66 | 212 | 2.63 | 2.90 |
| Clayton Kershaw | 21 | LA Dodgers | 31 | 8 | 8 | 171.0 | 701 | 119 | 28 | 0 | 7 | 55 | 53 | 91 | 185 | 2.79 | 2.89 |
| Javier Vazquez | 33 | Atlanta | 32 | 15 | 10 | 219.1 | 874 | 181 | 28 | 6 | 20 | 75 | 70 | 44 | 238 | 2.87 | 3.08 |
| Matt Cain | 25 | San Francisco | 33 | 14 | 8 | 217.2 | 886 | 184 | 36 | 5 | 22 | 73 | 70 | 73 | 171 | 2.89 | 3.02 |
| Thomas Hanson | 23 | Atlanta | 21 | 11 | 4 | 127.2 | 522 | 105 | 22 | 5 | 10 | 42 | 41 | 46 | 116 | 2.89 | 2.96 |
| J.A. Happ | 27 | Philadelphia | 35 | 12 | 4 | 166.0 | 685 | 149 | 31 | 2 | 20 | 55 | 54 | 56 | 119 | 2.93 | 2.98 |
| Wandy Rodriguez | 30 | Houston | 33 | 14 | 12 | 205.2 | 849 | 192 | 40 | 1 | 21 | 77 | 69 | 63 | 193 | 3.02 | 3.37 |
| Ted Lilly | 34 | Chi Cubs | 27 | 12 | 9 | 177.0 | 706 | 151 | 39 | 1 | 22 | 66 | 61 | 36 | 151 | 3.10 | 3.36 |
| Johan Santana | 30 | NY Mets | 25 | 13 | 9 | 166.2 | 701 | 156 | 35 | 1 | 20 | 67 | 58 | 46 | 146 | 3.13 | 3.62 |
| Dan Haren | 29 | Arizona | 34 | 14 | 10 | 232.1 | 922 | 195 | 38 | 6 | 27 | 84 | 81 | 38 | 227 | 3.14 | 3.25 |
| Randy Wells | 27 | Chi Cubs | 27 | 12 | 10 | 165.1 | 694 | 166 | 21 | 1 | 14 | 67 | 58 | 46 | 104 | 3.16 | 3.65 |
| Josh Johnson | 26 | Florida | 33 | 15 | 5 | 209.0 | 855 | 184 | 22 | 6 | 14 | 77 | 75 | 58 | 191 | 3.23 | 3.32 |
| Randy Wolf | 33 | LA Dodgers | 34 | 11 | 7 | 214.1 | 862 | 179 | 39 | 3 | 24 | 81 | 80 | 58 | 160 | 3.36 | 3.40 |
| Ubaldo Jimenez | 26 | Colorado | 33 | 15 | 12 | 218.0 | 914 | 183 | 32 | 3 | 13 | 87 | 84 | 85 | 198 | 3.47 | 3.59 |
| Joel Pineiro | 31 | St. Louis | 32 | 15 | 12 | 214.0 | 865 | 218 | 49 | 3 | 11 | 94 | 83 | 27 | 105 | 3.49 | 3.95 |
| Ryan Dempster | 32 | Chi Cubs | 31 | 11 | 9 | 200.0 | 842 | 196 | 41 | 3 | 22 | 94 | 81 | 65 | 172 | 3.65 | 4.23 |
| Yovani Gallardo | 23 | Milwaukee | 30 | 13 | 12 | 185.2 | 793 | 150 | 45 | 3 | 21 | 78 | 77 | 94 | 204 | 3.73 | 3.78 |
| Hiroki Kuroda | 34 | LA Dodgers | 21 | 8 | 7 | 117.1 | 485 | 110 | 26 | 3 | 12 | 59 | 49 | 24 | 87 | 3.76 | 4.53 |
| Carlos Zambrano | 28 | Chi Cubs | 28 | 9 | 7 | 169.1 | 733 | 155 | 24 | 6 | 10 | 78 | 71 | 78 | 152 | 3.77 | 4.15 |
| Bronson Arroyo | 32 | Cincinnati | 33 | 15 | 13 | 220.1 | 923 | 214 | 40 | 2 | 31 | 101 | 94 | 65 | 127 | 3.84 | 4.13 |
| Kenshin Kawakami | 34 | Atlanta | 32 | 7 | 12 | 156.1 | 669 | 153 | 40 | 10 | 15 | 73 | 67 | 57 | 105 | 3.86 | 4.20 |
| John Lannan | 25 | Washington | 33 | 9 | 13 | 206.1 | 875 | 210 | 48 | 3 | 22 | 100 | 89 | 68 | 89 | 3.88 | 4.36 |
| Kevin Correia | 29 | San Diego | 33 | 12 | 11 | 198.0 | 830 | 194 | 39 | 2 | 17 | 92 | 86 | 64 | 142 | 3.91 | 4.18 |
| Ross Ohlendorf | 27 | Pittsburgh | 29 | 11 | 10 | 176.2 | 725 | 165 | 36 | 6 | 25 | 80 | 77 | 53 | 109 | 3.92 | 4.08 |
| Edward Mujica | 25 | San Diego | 67 | 3 | 5 | 93.2 | 393 | 101 | 16 | 2 | 14 | 47 | 41 | 19 | 76 | 3.94 | 4.52 |
| Chad Billingsley | 25 | LA Dodgers | 33 | 12 | 11 | 196.1 | 823 | 173 | 37 | 3 | 17 | 94 | 88 | 86 | 179 | 4.03 | 4.31 |
| Doug Davis | 34 | Arizona | 34 | 9 | 14 | 203.1 | 889 | 202 | 31 | 6 | 25 | 101 | 91 | 103 | 146 | 4.03 | 4.47 |

