| SP | Richard, J.Richard, J.R. $ >> | 30 | 1980 | R | 90 | 34 | 34 | 16 | 8 | 2.96 | .271 | 1.09 | 6.5 | 3.3 | 7.4 | 243.0 | 176 | 88 | 80 | 24 | 90 | 199 | 7 | 0 | 0 | 2 | 25 | 5 | 1 | 3.82 |
| SP | Lundgren, C.Lundgren, Carl † >> | 27 | 1907 | R | 43 | 33 | 31 | 17 | 9 | 3.38 | .305 | 1.27 | 6.4 | 5.1 | 4.6 | 208.0 | 148 | 84 | 78 | 14 | 117 | 106 | 5 | 1 | 0 | 1 | 20 | 9 | 3 | 4.67 |
| RP | Doolittle, S.Doolittle, Sean † >> | 31 | 2018 | L | 99 | 78 | 0 | 8 | 3 | 3.40 | .260 | 1.03 | 6.7 | 2.5 | 8.4 | 106.0 | 79 | 42 | 40 | 13 | 30 | 99 | 0 | 5 | 4 | 0 | 0 | 3 | 1 | 3.66 |
| RP | Papelbon, J.Papelbon, Jonathan † >> | 27 | 2007 | R | 92 | 74 | 0 | 4 | 4 | 3.02 | .276 | 1.13 | 7.4 | 2.8 | 8.7 | 95.1 | 78 | 34 | 32 | 12 | 30 | 92 | 0 | 13 | 3 | 0 | 0 | 1 | 0 | 3.68 |
| RP | Percival, T.Percival, Troy >> | 26 | 1995 | R | 83 | 47 | 0 | 5 | 2 | 1.11 | .254 | 0.96 | 4.4 | 4.4 | 7.5 | 64.2 | 31 | 10 | 8 | 4 | 31 | 53 | 0 | 7 | 1 | 0 | 0 | 4 | 2 | 3.80 |
| RP | Treinen, B.Treinen, Blake >> | 30 | 2018 | R | 80 | 35 | 0 | 4 | 3 | 3.19 | .286 | 1.20 | 7.3 | 3.8 | 7.8 | 36.2 | 29 | 13 | 13 | 3 | 15 | 31 | 0 | 2 | 2 | 0 | 0 | 0 | 4 | 3.61 |
| RP | Marmol, C.Marmol, Carlos >> | 26 | 2008 | R | 71 | 29 | 0 | 2 | 0 | 2.62 | .280 | 1.14 | 6.9 | 3.4 | 9.0 | 34.1 | 26 | 10 | 10 | 2 | 13 | 34 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 3.00 |
| SP | Marichal, J.Marichal, Juan >> | 29 | 1966 | R | 77 | 33 | 32 | 13 | 13 | 4.58 | .295 | 1.22 | 9.0 | 2.0 | 4.7 | 212.1 | 213 | 119 | 108 | 37 | 47 | 111 | 12 | 0 | 0 | 1 | 13 | 6 | 1 | 4.97 |