| SP | Kershaw, C.Kershaw, Clayton † >> | 21 | 2009 | L | 91 | 24 | 24 | 12 | 6 | 2.58 | .295 | 1.24 | 7.3 | 3.9 | 9.3 | 139.2 | 112 | 46 | 40 | 6 | 61 | 143 | 0 | 0 | 0 | 0 | 9 | 2 | 6 | 2.86 |
| SP | Gallardo, Y.Gallardo, Yovani >> | 23 | 2009 | R | 72 | 23 | 23 | 5 | 6 | 3.67 | .312 | 1.35 | 8.3 | 3.8 | 8.9 | 137.1 | 127 | 60 | 56 | 18 | 58 | 136 | 1 | 0 | 0 | 0 | 10 | 2 | 4 | 4.04 |
| SP | Pineiro, J.Pineiro, Joel # >> | 31 | 2009 | R | 69 | 22 | 22 | 8 | 7 | 4.51 | .324 | 1.41 | 10.6 | 2.2 | 6.0 | 137.2 | 161 | 70 | 69 | 18 | 33 | 92 | 2 | 0 | 0 | 0 | 11 | 4 | 1 | 4.18 |
| SP | Zambrano, C.Zambrano, Carlos # >> | 28 | 2009 | R | 43 | 22 | 22 | 7 | 8 | 5.58 | .376 | 1.77 | 9.9 | 6.0 | 7.3 | 108.0 | 119 | 71 | 67 | 10 | 72 | 87 | 0 | 0 | 0 | 0 | 11 | 4 | 6 | 4.70 |
| SP | Zimmermann, J.Zimmermann, Jordan # >> | 23 | 2009 | R | 35 | 22 | 22 | 4 | 6 | 5.13 | .332 | 1.46 | 10.4 | 2.7 | 8.6 | 114.0 | 132 | 65 | 65 | 12 | 34 | 109 | 0 | 0 | 0 | 0 | 10 | 4 | 0 | 3.46 |
| RP | Okajima, H.Okajima, Hideki >> | 34 | 2009 | L | 33 | 54 | 0 | 6 | 4 | 4.20 | .318 | 1.40 | 7.8 | 4.8 | 7.2 | 45.0 | 39 | 21 | 21 | 7 | 24 | 36 | 0 | 0 | 3 | 0 | 0 | 0 | 0 | 5.02 |
| CL | Gregerson, L.Gregerson, Luke >> | 25 | 2009 | R | 50 | 51 | 0 | 5 | 3 | 3.06 | .296 | 1.23 | 7.5 | 3.6 | 11.0 | 53.0 | 44 | 19 | 18 | 6 | 21 | 65 | 0 | 1 | 1 | 0 | 0 | 2 | 2 | 3.32 |
| RP | Kelley, S.Kelley, Shawn >> | 25 | 2009 | R | 40 | 30 | 0 | 3 | 0 | 1.00 | .206 | 0.74 | 5.7 | 1.0 | 7.7 | 27.0 | 17 | 3 | 3 | 1 | 3 | 23 | 0 | 1 | 0 | 0 | 0 | 1 | 2 | 2.22 |
| RP | Rodriguez, F.Rodriguez, Francisco >> | 27 | 2009 | R | 45 | 50 | 0 | 6 | 0 | 3.67 | .366 | 1.71 | 9.4 | 6.1 | 8.4 | 49.0 | 51 | 21 | 20 | 7 | 33 | 46 | 0 | 1 | 2 | 0 | 0 | 1 | 1 | 5.06 |
| RP | Madson, R.Madson, Ryan >> | 29 | 2009 | R | 37 | 12 | 0 | 0 | 0 | 6.94 | .417 | 2.06 | 15.5 | 4.1 | 10.6 | 11.2 | 19 | 9 | 9 | 4 | 5 | 13 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 7.00 |
| RP | Papelbon, J.Papelbon, Jonathan † >> | 29 | 2009 | R | 67 | 36 | 0 | 0 | 3 | 2.52 | .267 | 1.09 | 6.2 | 3.9 | 9.0 | 35.2 | 24 | 10 | 10 | 4 | 15 | 35 | 0 | 29 | 0 | 0 | 0 | 0 | 0 | 3.77 |