| 2009 IL Leaders | |||||||||||||||||
| Name | Age | Team | G | W | L | IP | TBF | H | 2B | 3B | HR | R | ER | BB | SO | ERA | RA9 |
| Charlie Zink | 30 | Pawtucket | 27 | 6 | 15 | 135.1 | 632 | 133 | 31 | 4 | 10 | 88 | 84 | 93 | 47 | 5.59 | 5.85 |
| Wade Davis | 24 | Durham | 28 | 10 | 8 | 158.2 | 673 | 139 | 24 | 3 | 14 | 71 | 60 | 60 | 140 | 3.40 | 4.03 |
| Ruddy Lugo | 29 | Toledo | 25 | 13 | 9 | 141.2 | 618 | 148 | 33 | 3 | 14 | 77 | 64 | 57 | 82 | 4.07 | 4.89 |
| Wesley Whisler | 26 | Charlotte | 26 | 10 | 12 | 152.2 | 664 | 166 | 34 | 2 | 10 | 83 | 69 | 56 | 78 | 4.07 | 4.89 |
| Carlos Torres | 27 | Charlotte | 23 | 10 | 4 | 128.0 | 528 | 96 | 29 | 2 | 4 | 38 | 34 | 56 | 130 | 2.39 | 2.67 |
| Brooks Brown | 24 | Toledo | 20 | 3 | 13 | 112.2 | 506 | 120 | 29 | 2 | 9 | 63 | 59 | 55 | 48 | 4.71 | 5.03 |
| Kevin Mulvey | 24 | Rochester | 24 | 5 | 8 | 149.0 | 644 | 153 | 24 | 3 | 12 | 84 | 65 | 54 | 113 | 3.93 | 5.07 |
| Enrique Gonzalez | 27 | Pawtucket | 26 | 8 | 11 | 139.0 | 617 | 159 | 39 | 5 | 20 | 85 | 79 | 53 | 99 | 5.12 | 5.50 |
| Andy Mitchell | 31 | Norfolk | 37 | 11 | 5 | 113.1 | 503 | 126 | 28 | 3 | 13 | 73 | 66 | 52 | 58 | 5.24 | 5.80 |
| Ramon Ramirez | 27 | Louisville | 31 | 6 | 7 | 127.1 | 546 | 122 | 19 | 2 | 13 | 68 | 57 | 50 | 78 | 4.03 | 4.81 |
| Chris Waters | 29 | Norfolk | 29 | 9 | 7 | 114.1 | 504 | 114 | 25 | 4 | 12 | 66 | 57 | 47 | 71 | 4.49 | 5.20 |
| Todd Redmond | 24 | Gwinnett Co | 27 | 9 | 6 | 145.0 | 635 | 152 | 32 | 5 | 21 | 85 | 71 | 47 | 106 | 4.41 | 5.28 |
| Andrew Carpenter | 24 | Lehigh Valley | 25 | 11 | 6 | 156.0 | 655 | 162 | 29 | 1 | 18 | 67 | 58 | 47 | 120 | 3.35 | 3.87 |
| Michael Bowden | 23 | Pawtucket | 24 | 4 | 6 | 126.1 | 517 | 106 | 27 | 2 | 11 | 47 | 44 | 47 | 88 | 3.13 | 3.35 |
| Eric Hacker | 26 | Indianapolis | 21 | 5 | 6 | 116.1 | 516 | 135 | 35 | 4 | 6 | 57 | 52 | 46 | 82 | 4.02 | 4.41 |
| David Pauley | 26 | Norfolk | 27 | 9 | 12 | 152.1 | 668 | 171 | 31 | 0 | 15 | 87 | 74 | 45 | 108 | 4.37 | 5.14 |
| Philip Humber | 27 | Rochester | 23 | 7 | 9 | 119.2 | 539 | 135 | 34 | 1 | 15 | 79 | 71 | 45 | 87 | 5.34 | 5.94 |
| Sam Lecure | 25 | Louisville | 25 | 10 | 8 | 143.1 | 605 | 143 | 24 | 1 | 17 | 76 | 71 | 44 | 125 | 4.46 | 4.77 |
| Kris Johnson | 25 | Pawtucket | 22 | 3 | 13 | 96.1 | 457 | 128 | 34 | 2 | 8 | 77 | 68 | 44 | 65 | 6.35 | 7.19 |
| Carlos Hernandez | 29 | Durham | 21 | 7 | 6 | 112.0 | 470 | 100 | 29 | 0 | 8 | 45 | 41 | 42 | 81 | 3.29 | 3.62 |
| Jonathan Venters | 24 | Gwinnett Co | 17 | 4 | 7 | 91.1 | 408 | 103 | 25 | 3 | 7 | 64 | 57 | 42 | 58 | 5.62 | 6.31 |
| Gustavo Chacin | 29 | Lehigh Valley | 18 | 8 | 4 | 106.2 | 450 | 105 | 25 | 1 | 9 | 44 | 38 | 41 | 62 | 3.21 | 3.71 |
| Kei Igawa | 30 | Scranton/WB | 27 | 10 | 8 | 145.1 | 631 | 165 | 32 | 5 | 21 | 75 | 67 | 40 | 105 | 4.15 | 4.64 |
| Ben Jukich | 27 | Louisville | 29 | 9 | 6 | 123.0 | 523 | 125 | 21 | 1 | 16 | 64 | 56 | 40 | 106 | 4.10 | 4.68 |
| Jason Jones | 27 | Rochester | 31 | 5 | 11 | 134.2 | 603 | 172 | 34 | 1 | 20 | 93 | 86 | 39 | 73 | 5.75 | 6.22 |
| 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 |
| 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 |

