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| Name | W | L | SV | ERA | G | GS | IP | HA | R | ER | HR | BB | K | WHIP | OAVG | BABIP | WAR |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Domingo German SP | 0 | 0 | 0 | 0.00 | 1 | 0 | 1.2 | 1 | 0 | 0 | 0 | 0 | 2 | 0.60 | .167 | .250 | 0.1 |
| Adam Ottavino RP | 3 | 0 | 2 | 1.67 | 33 | 0 | 43.0 | 26 | 9 | 8 | 0 | 18 | 50 | 1.02 | .176 | .265 | 1.1 |
| Dan Otero RP | 0 | 0 | 0 | 2.02 | 28 | 0 | 40.0 | 41 | 10 | 9 | 3 | 5 | 20 | 1.15 | .272 | .295 | 0.4 |
| Ben Heller RP | 2 | 1 | 0 | 2.79 | 21 | 0 | 29.0 | 23 | 10 | 9 | 5 | 6 | 32 | 1.00 | .215 | .254 | 0.2 |
| Gerrit Cole SP | 11 | 2 | 0 | 3.18 | 20 | 20 | 130.1 | 118 | 48 | 46 | 14 | 36 | 170 | 1.18 | .238 | .332 | 3.8 |
| Aroldis Chapman CL | 0 | 3 | 23 | 3.34 | 37 | 0 | 35.0 | 19 | 13 | 13 | 3 | 19 | 57 | 1.09 | .154 | .254 | 1.4 |
| Jonathan Loaisiga SP | 10 | 6 | 0 | 3.72 | 18 | 18 | 104.0 | 99 | 47 | 43 | 12 | 31 | 109 | 1.25 | .249 | .313 | 2.0 |
| Zack Britton RP | 5 | 1 | 0 | 3.82 | 32 | 0 | 33.0 | 28 | 14 | 14 | 3 | 13 | 33 | 1.24 | .228 | .284 | 0.4 |
| Masahiro Tanaka SP | 8 | 5 | 0 | 4.58 | 19 | 19 | 108.0 | 120 | 64 | 55 | 17 | 25 | 97 | 1.34 | .275 | .318 | 1.4 |
| Jonathan Holder CL | 0 | 0 | 1 | 4.63 | 11 | 0 | 11.2 | 17 | 8 | 6 | 1 | 2 | 11 | 1.63 | .333 | .400 | 0.1 |
| Chad Green RP | 5 | 4 | 0 | 4.71 | 40 | 1 | 36.1 | 45 | 23 | 19 | 4 | 17 | 43 | 1.71 | .306 | .410 | 0.3 |
| Jordan Montgomery SP | 2 | 3 | 0 | 4.84 | 10 | 10 | 61.1 | 71 | 36 | 33 | 11 | 23 | 37 | 1.53 | .292 | .303 | -0.2 |
| Tommy Kahnle RP | 2 | 0 | 0 | 4.86 | 32 | 0 | 33.1 | 28 | 18 | 18 | 4 | 21 | 41 | 1.47 | .226 | .300 | 0.1 |
| James Paxton SP | 3 | 3 | 0 | 4.93 | 9 | 9 | 49.1 | 64 | 34 | 27 | 7 | 10 | 48 | 1.50 | .311 | .375 | 0.8 |
| Deivi Garcia RP | 1 | 1 | 0 | 5.70 | 20 | 0 | 30.0 | 27 | 19 | 19 | 6 | 13 | 41 | 1.33 | .235 | .309 | -0.2 |
| J.A. Happ SP | 5 | 8 | 0 | 6.75 | 18 | 18 | 90.2 | 108 | 68 | 68 | 12 | 37 | 76 | 1.60 | .293 | .336 | 0.8 |
| Hunter Strickland RP | 0 | 1 | 0 | 9.64 | 9 | 0 | 9.1 | 15 | 10 | 10 | 4 | 3 | 10 | 1.93 | .357 | .379 | -0.3 |
