| SP | Greinke, Z.Greinke, Zack >> | 26 | 2009 | R | 97 | 28 | 28 | 11 | 11 | 3.88 | .282 | 1.16 | 8.0 | 2.4 | 8.6 | 199.2 | 177 | 89 | 86 | 24 | 54 | 191 | 6 | 0 | 0 | 2 | 17 | 4 | 6 | 3.52 |
| SP | Kershaw, C.Kershaw, Clayton >> | 21 | 2009 | L | 91 | 27 | 27 | 12 | 7 | 3.01 | .299 | 1.28 | 7.2 | 4.3 | 8.0 | 158.1 | 127 | 55 | 53 | 15 | 75 | 141 | 0 | 0 | 0 | 0 | 12 | 1 | 6 | 3.89 |
| SP | Gallardo, Y.Gallardo, Yovani >> | 23 | 2009 | R | 72 | 27 | 27 | 16 | 5 | 3.21 | .295 | 1.24 | 7.5 | 3.7 | 8.8 | 179.1 | 149 | 64 | 64 | 21 | 73 | 175 | 0 | 0 | 0 | 0 | 21 | 3 | 2 | 3.84 |
| SP | Billingsley, C.Billingsley, Chad >> | 25 | 2009 | R | 66 | 27 | 26 | 4 | 11 | 5.43 | .357 | 1.65 | 10.2 | 4.6 | 6.9 | 126.0 | 143 | 77 | 76 | 18 | 65 | 97 | 0 | 0 | 0 | 0 | 1 | 2 | 4 | 4.91 |
| SP | Palmer, M.Palmer, Matt >> | 30 | 2009 | R | 58 | 26 | 25 | 0 | 1 | 4.40 | .319 | 1.37 | 9.1 | 3.2 | 6.2 | 61.1 | 62 | 30 | 30 | 6 | 22 | 42 | 0 | 0 | 0 | 0 | 0 | 2 | 3 | 4.08 |
| RP | Meyer, D.Meyer, Dan † # >> | 28 | 2009 | L | 59 | 88 | 0 | 10 | 5 | 3.31 | .281 | 1.16 | 6.8 | 3.7 | 8.3 | 130.2 | 98 | 54 | 48 | 15 | 53 | 120 | 0 | 7 | 3 | 0 | 0 | 2 | 3 | 3.92 |
| RP | Marmol, C.Marmol, Carlos >> | 27 | 2009 | R | 43 | 69 | 0 | 2 | 2 | 2.33 | .304 | 1.30 | 6.0 | 5.7 | 9.8 | 81.0 | 54 | 23 | 21 | 3 | 51 | 88 | 0 | 9 | 2 | 0 | 0 | 1 | 4 | 3.23 |
| RP | Rodriguez, F.Rodriguez, Francisco >> | 27 | 2009 | R | 45 | 50 | 0 | 5 | 4 | 4.11 | .314 | 1.34 | 7.2 | 5.0 | 8.4 | 65.2 | 52 | 31 | 30 | 8 | 36 | 61 | 0 | 4 | 5 | 0 | 0 | 2 | 1 | 4.48 |