| NAME | IP | SEASON | TM | G | W | L | W% | GS | ERA | SO | CG | SHO | SV | H | ER | R | HR | BB | HBP | GF | IBB | TBF | WP | K/9 | BB/9 | K/BB | HR/9 | K% | BB% | WHIP | BABIP | RA | ERA- | FIP | FIP- | H/9 | PRAA | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | R. Porcello | 172.0 | 2015 |  BOS | 28 | 9 | 15 | .375 | 28 | 4.92 | 149 | 0 | 0 | 0 | 196 | 94 | 103 | 25 | 38 | 10 | 0 | 0 | 737 | 12 | 7.80 | 1.99 | 3.92 | 1.31 | 20.2 | 5.2 | 1.36 | .332 | 5.39 | 118 | 4.12 | 104 | 10.26 | -3.4 |
| 2 | | R. Porcello | 223.0 | 2016 | BOS | 33 | 22 | 4 | .846 | 33 | 3.15 | 189 | 3 | 0 | 0 | 193 | 78 | 85 | 23 | 32 | 13 | 0 | 0 | 890 | 3 | 7.63 | 1.29 | 5.91 | 0.93 | 21.2 | 3.6 | 1.01 | .269 | 3.43 | 71 | 3.39 | 81 | 7.79 | 20.1 |
| 3 | | R. Porcello | 203.1 | 2017 | BOS | 33 | 11 | 17 | .393 | 33 | 4.65 | 181 | 2 | 0 | 0 | 236 | 105 | 125 | 38 | 48 | 6 | 0 | 1 | 885 | 5 | 8.01 | 2.12 | 3.77 | 1.68 | 20.5 | 5.4 | 1.40 | .324 | 5.53 | 101 | 4.60 | 106 | 10.45 | -5.9 |
| 4 | | R. Porcello | 191.1 | 2018 | BOS | 33 | 17 | 7 | .708 | 33 | 4.28 | 190 | 1 | 0 | 0 | 177 | 91 | 97 | 27 | 48 | 16 | 0 | 0 | 808 | 3 | 8.94 | 2.26 | 3.96 | 1.27 | 23.5 | 5.9 | 1.18 | .285 | 4.56 | 97 | 4.01 | 96 | 8.33 | 3.8 |
| 5 | | R. Porcello | 174.1 | 2019 | BOS | 32 | 14 | 12 | .538 | 32 | 5.52 | 143 | 0 | 0 | 0 | 198 | 107 | 114 | 31 | 45 | 6 | 0 | 2 | 768 | 5 | 7.38 | 2.32 | 3.18 | 1.60 | 18.6 | 5.9 | 1.39 | .308 | 5.89 | 114 | 4.75 | 105 | 10.22 | -4.6 |
| Total | 964.0 | 159 | 73 | 55 | .570 | 159 | 4.43 | 852 | 6 | 0 | 0 | 1,000 | 475 | 524 | 144 | 211 | 51 | 0 | 3 | 4,088 | 28 | 7.95 | 1.97 | 4.04 | 1.34 | 20.8 | 5.2 | 1.26 | .302 | 4.89 | 99 | 4.14 | 98 | 9.34 | 10 |
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