| SP | Martinez, P.Martinez, Pedro † >> | 26 | 1997 | R | 99 | 36 | 36 | 18 | 13 | 3.77 | .300 | 1.24 | 7.7 | 3.4 | 10.1 | 243.2 | 208 | 108 | 102 | 25 | 93 | 274 | 11 | 0 | 0 | 5 | 19 | 12 | 2 | 3.38 |
| SP | Scherzer, M.Scherzer, Max >> | 31 | 2015 | R | 93 | 35 | 35 | 15 | 14 | 3.98 | .282 | 1.14 | 8.0 | 2.3 | 10.1 | 230.2 | 204 | 102 | 102 | 24 | 58 | 259 | 7 | 0 | 0 | 3 | 20 | 10 | 8 | 2.99 |
| SP | Strasburg, S.Strasburg, Stephen >> | 30 | 2019 | R | 87 | 35 | 34 | 9 | 15 | 5.34 | .317 | 1.37 | 9.0 | 3.3 | 10.0 | 192.0 | 193 | 120 | 114 | 31 | 70 | 213 | 0 | 0 | 0 | 0 | 18 | 4 | 3 | 4.04 |
| SP | Rogers, S.Rogers, Steve >> | 33 | 1982 | R | 57 | 34 | 33 | 19 | 9 | 4.14 | .293 | 1.22 | 8.2 | 2.7 | 7.1 | 226.0 | 207 | 115 | 104 | 29 | 69 | 179 | 12 | 1 | 0 | 4 | 16 | 5 | 2 | 4.07 |
| SP | Corbin, P.Corbin, Patrick >> | 29 | 2019 | L | 60 | 33 | 31 | 12 | 10 | 4.91 | .311 | 1.35 | 8.9 | 3.3 | 9.6 | 183.1 | 180 | 101 | 100 | 23 | 68 | 195 | 1 | 0 | 0 | 1 | 15 | 0 | 2 | 3.62 |
| RP | Urbina, U.Urbina, Ugueth >> | 23 | 1997 | R | 50 | 81 | 0 | 3 | 0 | 4.09 | .325 | 1.39 | 8.8 | 3.8 | 9.9 | 114.1 | 111 | 57 | 52 | 15 | 48 | 126 | 0 | 6 | 2 | 0 | 0 | 6 | 1 | 3.92 |
| RP | Doolittle, S.Doolittle, Sean >> | 32 | 2019 | L | 29 | 64 | 0 | 6 | 4 | 4.55 | .329 | 1.45 | 10.0 | 3.1 | 9.6 | 85.0 | 94 | 45 | 43 | 19 | 29 | 91 | 0 | 7 | 4 | 0 | 0 | 2 | 0 | 4.86 |
| RP | Reardon, J.Reardon, Jeff >> | 27 | 1982 | R | 54 | 55 | 0 | 4 | 4 | 4.23 | .322 | 1.42 | 10.2 | 2.6 | 5.6 | 83.0 | 94 | 40 | 39 | 10 | 24 | 52 | 0 | 5 | 1 | 0 | 0 | 0 | 2 | 4.18 |
| RP | Papelbon, J.Papelbon, Jonathan >> | 35 | 2015 | R | 61 | 41 | 0 | 3 | 2 | 3.56 | .271 | 1.11 | 7.9 | 2.3 | 7.9 | 55.2 | 48 | 22 | 22 | 8 | 14 | 48 | 0 | 5 | 2 | 0 | 0 | 0 | 0 | 3.91 |
| RP | Storen, D.Storen, Drew # >> | 27 | 2015 | R | 60 | 43 | 0 | 1 | 1 | 5.31 | .337 | 1.51 | 10.9 | 2.8 | 9.6 | 57.2 | 69 | 35 | 34 | 10 | 18 | 61 | 0 | 4 | 2 | 0 | 0 | 1 | 3 | 4.14 |
| RP | Hudson, D.Hudson, Daniel >> | 32 | 2019 | R | 59 | 49 | 0 | 2 | 5 | 5.27 | .321 | 1.38 | 8.8 | 3.7 | 8.7 | 56.1 | 55 | 36 | 33 | 11 | 23 | 54 | 0 | 4 | 0 | 0 | 0 | 2 | 2 | 4.96 |