| SP | Leonard, D.Leonard, Dutch >> | 22 | 1914 | L | 91 | 29 | 29 | 10 | 11 | 4.21 | .277 | 1.11 | 7.4 | 2.6 | 4.6 | 179.2 | 148 | 88 | 84 | 22 | 52 | 92 | 2 | 0 | 0 | 1 | 16 | 6 | 0 | 4.54 |
| SP | Richard, J.Richard, J.R. † >> | 30 | 1980 | R | 90 | 27 | 27 | 17 | 2 | 2.55 | .284 | 1.17 | 6.9 | 3.6 | 6.7 | 190.2 | 146 | 59 | 54 | 11 | 77 | 142 | 1 | 0 | 0 | 1 | 22 | 4 | 2 | 3.54 |
| SP | Reulbach, E.Reulbach, Ed >> | 24 | 1906 | R | 61 | 25 | 25 | 9 | 7 | 4.31 | .326 | 1.44 | 7.8 | 5.1 | 4.7 | 148.1 | 129 | 84 | 71 | 14 | 84 | 78 | 2 | 0 | 0 | 0 | 12 | 2 | 0 | 4.92 |
| RP | Williams, D.Williams, Devin † >> | 28 | 2023 | R | 72 | 80 | 0 | 8 | 6 | 4.30 | .320 | 1.41 | 7.0 | 5.7 | 9.6 | 96.1 | 75 | 46 | 46 | 8 | 61 | 102 | 0 | 11 | 2 | 0 | 0 | 0 | 3 | 3.86 |
| RP | Balfour, G.Balfour, Grant >> | 31 | 2008 | R | 74 | 74 | 0 | 8 | 4 | 3.21 | .267 | 1.08 | 5.7 | 4.0 | 7.3 | 98.0 | 62 | 37 | 35 | 8 | 44 | 80 | 0 | 14 | 4 | 0 | 0 | 1 | 3 | 3.81 |
| RP | Bautista, F.Bautista, Félix >> | 28 | 2023 | R | 75 | 57 | 0 | 4 | 0 | 4.36 | .320 | 1.39 | 7.0 | 5.6 | 9.4 | 66.0 | 51 | 32 | 32 | 6 | 41 | 69 | 0 | 8 | 2 | 0 | 0 | 1 | 7 | 4.00 |
| RP | Marmol, C.Marmol, Carlos >> | 26 | 2008 | R | 71 | 52 | 0 | 5 | 1 | 3.71 | .319 | 1.35 | 6.1 | 6.1 | 7.0 | 53.1 | 36 | 22 | 22 | 2 | 36 | 41 | 0 | 8 | 2 | 0 | 0 | 3 | 6 | 4.15 |
| RP | Valverde, J.Valverde, Jose >> | 24 | 2003 | R | 63 | 42 | 0 | 2 | 1 | 4.36 | .366 | 1.71 | 6.7 | 8.8 | 9.8 | 43.1 | 32 | 26 | 21 | 4 | 42 | 47 | 0 | 2 | 1 | 0 | 0 | 1 | 1 | 5.02 |