| SP | Johnson, W.Johnson, Walter $$ >> | 26 | 1913 | R | 95 | 30 | 30 | 12 | 11 | 3.78 | .277 | 1.13 | 8.2 | 2.0 | 5.6 | 204.2 | 186 | 100 | 86 | 19 | 46 | 127 | 1 | 0 | 0 | 0 | 15 | 3 | 5 | 3.69 |
| SP | Leonard, D.Leonard, Dutch $$ >> | 22 | 1914 | L | 91 | 29 | 29 | 13 | 6 | 3.14 | .279 | 1.14 | 6.8 | 3.5 | 5.8 | 183.1 | 138 | 72 | 64 | 18 | 71 | 117 | 0 | 0 | 0 | 0 | 17 | 4 | 0 | 4.23 |
| SP | Hernandez, F.Hernandez, Felix >> | 28 | 2014 | R | 79 | 28 | 28 | 9 | 10 | 5.77 | .338 | 1.52 | 10.1 | 3.5 | 7.0 | 159.0 | 179 | 107 | 102 | 21 | 62 | 123 | 0 | 0 | 0 | 0 | 12 | 3 | 13 | 4.40 |
| CL | Doolittle, S.Doolittle, Sean >> | 31 | 2018 | L | 99 | 59 | 0 | 5 | 10 | 4.95 | .305 | 1.30 | 8.7 | 3.0 | 10.2 | 60.0 | 58 | 33 | 33 | 7 | 20 | 68 | 0 | 31 | 10 | 0 | 0 | 1 | 3 | 3.30 |
| SU | Papelbon, J.Papelbon, Jonathan >> | 27 | 2007 | R | 92 | 49 | 0 | 2 | 1 | 2.96 | .296 | 1.26 | 8.2 | 3.3 | 8.0 | 54.2 | 49 | 21 | 18 | 8 | 20 | 48 | 0 | 4 | 3 | 0 | 0 | 0 | 0 | 4.26 |
| RP | Gallegos, G.Gallegos, Giovanny >> | 27 | 2019 | R | 82 | 68 | 0 | 5 | 3 | 3.54 | .264 | 1.05 | 6.9 | 2.6 | 9.1 | 76.1 | 58 | 31 | 30 | 11 | 22 | 77 | 0 | 4 | 3 | 0 | 0 | 2 | 0 | 3.80 |
| RP | Pagan, E.Pagan, Emilio >> | 28 | 2019 | R | 77 | 52 | 0 | 2 | 7 | 6.46 | .355 | 1.61 | 10.9 | 3.6 | 9.0 | 47.1 | 57 | 36 | 34 | 14 | 19 | 47 | 0 | 3 | 1 | 0 | 0 | 2 | 0 | 6.21 |
| RP | Dotel, O.Dotel, Octavio >> | 29 | 2002 | R | 69 | 29 | 0 | 1 | 0 | 2.10 | .290 | 1.22 | 7.9 | 3.2 | 9.0 | 34.1 | 30 | 12 | 8 | 2 | 12 | 34 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2.82 |