| 2009 IL Leaders | |||||||||||||||||
| Name | Age | Team | G | W | L | IP | TBF | H | 2B | 3B | HR | R | ER | BB | SO | ERA | RA9 |
| Rodrigo Lopez | 34 | Lehigh Valley | 18 | 7 | 5 | 100.1 | 427 | 122 | 18 | 1 | 9 | 57 | 48 | 14 | 71 | 4.31 | 5.11 |
| Eddie Bonine | 28 | Toledo | 17 | 4 | 5 | 102.0 | 423 | 112 | 32 | 2 | 9 | 54 | 50 | 16 | 51 | 4.41 | 4.76 |
| Virgil Vasquez | 27 | Indianapolis | 19 | 7 | 4 | 107.2 | 447 | 116 | 23 | 1 | 14 | 50 | 47 | 16 | 72 | 3.93 | 4.18 |
| Josh Towers | 32 | Scranton/WB | 19 | 7 | 6 | 101.2 | 404 | 89 | 14 | 0 | 13 | 32 | 31 | 24 | 55 | 2.74 | 2.83 |
| Matthew Maloney | 26 | Louisville | 22 | 9 | 9 | 143.0 | 591 | 143 | 28 | 6 | 11 | 56 | 49 | 24 | 125 | 3.08 | 3.52 |
| Armando Gabino | 26 | Rochester | 38 | 6 | 4 | 98.0 | 390 | 80 | 26 | 1 | 7 | 34 | 32 | 24 | 64 | 2.94 | 3.12 |
| Nelson Figueroa | 35 | Buffalo | 17 | 7 | 5 | 112.0 | 437 | 91 | 14 | 2 | 5 | 29 | 28 | 24 | 94 | 2.25 | 2.33 |
| Christopher Tillman | 21 | Norfolk | 18 | 8 | 6 | 96.2 | 399 | 85 | 14 | 1 | 5 | 36 | 29 | 26 | 99 | 2.70 | 3.35 |
| Jeremy Powell | 33 | Indianapolis | 34 | 4 | 7 | 98.2 | 437 | 113 | 19 | 1 | 9 | 48 | 41 | 26 | 61 | 3.74 | 4.38 |
| Jonathon Niese | 23 | Buffalo | 16 | 5 | 6 | 94.1 | 400 | 95 | 25 | 0 | 7 | 47 | 40 | 26 | 82 | 3.82 | 4.48 |
| Daniel McCutchen | 27 | Indianapolis | 25 | 13 | 6 | 142.2 | 594 | 145 | 32 | 5 | 10 | 63 | 55 | 29 | 110 | 3.47 | 3.97 |
| Clay Buchholz | 25 | Pawtucket | 17 | 7 | 2 | 99.0 | 387 | 67 | 13 | 1 | 7 | 30 | 26 | 30 | 89 | 2.36 | 2.73 |
| Chris Lambert | 26 | Toledo | 21 | 6 | 7 | 126.2 | 530 | 121 | 22 | 5 | 8 | 54 | 50 | 31 | 106 | 3.55 | 3.84 |
| Kyle Snyder | 32 | Buffalo | 33 | 3 | 8 | 104.1 | 452 | 115 | 21 | 1 | 12 | 54 | 49 | 32 | 74 | 4.23 | 4.66 |
| Jack Egbert | 26 | Charlotte | 30 | 6 | 11 | 108.2 | 497 | 133 | 30 | 2 | 13 | 73 | 64 | 33 | 79 | 5.30 | 6.05 |
| Chuck Lofgren | 24 | Columbus | 17 | 6 | 10 | 98.1 | 423 | 94 | 19 | 0 | 15 | 63 | 58 | 33 | 62 | 5.31 | 5.77 |
| Jake Arrieta | 23 | Norfolk | 17 | 5 | 8 | 91.2 | 401 | 97 | 15 | 3 | 9 | 46 | 40 | 33 | 78 | 3.93 | 4.52 |
| Marco Estrada | 26 | Syracuse | 28 | 9 | 5 | 136.1 | 560 | 133 | 24 | 2 | 10 | 61 | 55 | 33 | 98 | 3.63 | 4.03 |
| John Halama | 37 | Gwinnett Co | 16 | 4 | 7 | 90.1 | 387 | 92 | 19 | 1 | 8 | 47 | 45 | 33 | 54 | 4.48 | 4.68 |
| Zach Jackson | 26 | Columbus | 30 | 4 | 8 | 99.2 | 454 | 128 | 30 | 5 | 13 | 76 | 67 | 33 | 67 | 6.05 | 6.86 |
| Tobi Stoner | 25 | Buffalo | 16 | 7 | 7 | 97.2 | 414 | 92 | 23 | 3 | 9 | 45 | 43 | 34 | 64 | 3.96 | 4.15 |
| Reid Santos | 27 | Rochester | 25 | 2 | 6 | 97.2 | 454 | 132 | 36 | 3 | 10 | 67 | 51 | 34 | 66 | 4.70 | 6.17 |
| Kyle Kendrick | 25 | Lehigh Valley | 24 | 9 | 7 | 143.0 | 584 | 133 | 31 | 8 | 9 | 59 | 53 | 35 | 62 | 3.34 | 3.71 |
| Jason Cromer | 29 | Durham | 20 | 7 | 3 | 112.0 | 468 | 106 | 18 | 0 | 5 | 32 | 28 | 36 | 67 | 2.25 | 2.57 |
| Ty Taubenheim | 27 | Indianapolis | 26 | 7 | 9 | 106.0 | 456 | 108 | 22 | 2 | 8 | 53 | 43 | 37 | 63 | 3.65 | 4.50 |
| Collin Balester | 23 | Syracuse | 20 | 7 | 10 | 107.1 | 474 | 129 | 31 | 2 | 5 | 58 | 53 | 37 | 71 | 4.44 | 4.86 |
| Carlos Carrasco | 22 | Lehigh Valley | 21 | 6 | 9 | 114.2 | 501 | 118 | 25 | 3 | 14 | 73 | 66 | 38 | 112 | 5.18 | 5.73 |
| Jack Cassel | 29 | Columbus | 15 | 5 | 7 | 90.1 | 416 | 109 | 26 | 3 | 11 | 63 | 58 | 38 | 51 | 5.78 | 6.28 |
| Scot Drucker | 27 | Toledo | 29 | 8 | 3 | 113.0 | 485 | 116 | 38 | 2 | 13 | 63 | 60 | 38 | 77 | 4.78 | 5.02 |
| Jason Jones | 27 | Rochester | 31 | 5 | 11 | 134.2 | 603 | 172 | 34 | 1 | 20 | 93 | 86 | 39 | 73 | 5.75 | 6.22 |

