| Name | W | L | SV | ERA | G | GS | IP | HA | R | ER | HR | BB | K | WHIP | OAVG | BABIP | WAR |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mike Morin RP | 10 | 4 | 32 | 2.05 | 66 | 0 | 83.1 | 56 | 25 | 19 | 4 | 35 | 103 | 1.09 | .189 | .275 | 1.5 |
| Matt Wisler SP | 3 | 2 | 0 | 2.70 | 8 | 8 | 46.2 | 46 | 21 | 14 | 6 | 9 | 33 | 1.18 | .253 | .276 | 0.5 |
| Jose A. Ramirez RP | 3 | 4 | 1 | 3.31 | 81 | 4 | 100.2 | 71 | 42 | 37 | 13 | 46 | 108 | 1.16 | .200 | .246 | 0.4 |
| Marcus Stroman SP | 15 | 7 | 0 | 3.49 | 32 | 32 | 214.1 | 203 | 86 | 83 | 26 | 42 | 171 | 1.14 | .252 | .288 | 2.9 |
| Connor W. Jones SP | 15 | 8 | 0 | 3.58 | 32 | 32 | 193.2 | 175 | 82 | 77 | 22 | 61 | 146 | 1.22 | .238 | .269 | 1.8 |
| Jake Peavy SP | 5 | 7 | 7 | 3.64 | 59 | 5 | 131.0 | 130 | 63 | 53 | 23 | 42 | 94 | 1.31 | .258 | .275 | -0.5 |
| Carson Smith RP | 2 | 4 | 0 | 3.71 | 57 | 1 | 53.1 | 52 | 23 | 22 | 5 | 19 | 57 | 1.33 | .255 | .326 | 0.4 |
| Morgan Cooper SP | 8 | 6 | 0 | 3.75 | 18 | 18 | 105.2 | 95 | 49 | 44 | 10 | 44 | 94 | 1.32 | .239 | .288 | 1.3 |
| Kevin Gausman SP | 9 | 9 | 0 | 3.92 | 28 | 28 | 172.0 | 169 | 84 | 75 | 19 | 55 | 143 | 1.30 | .255 | .295 | 2.0 |
| Jim Henderson RP | 7 | 3 | 4 | 4.22 | 61 | 1 | 81.0 | 77 | 39 | 38 | 12 | 39 | 59 | 1.43 | .253 | .277 | -0.6 |
| Oliver Perez RP | 0 | 1 | 1 | 4.50 | 11 | 0 | 20.0 | 17 | 11 | 10 | 4 | 5 | 22 | 1.10 | .227 | .260 | -0.1 |
| Huston Street CL | 3 | 4 | 3 | 4.82 | 75 | 0 | 93.1 | 96 | 50 | 50 | 9 | 32 | 86 | 1.37 | .267 | .326 | 0.8 |
| Daniel Stumpf SP | 14 | 9 | 0 | 4.90 | 33 | 33 | 176.1 | 194 | 101 | 96 | 25 | 49 | 119 | 1.38 | .274 | .299 | 0.9 |
| Jackie Bradley Jr. CF | 0 | 0 | 0 | 27.00 | 1 | 0 | 0.1 | 3 | 1 | 1 | 0 | 0 | 0 | 9.00 | .750 | .750 | 0.0 |
