Brayan Bello has played 4 seasons for the Red Sox. He has 36 wins, 33 losses, an ERA of 4.14 and 435 strikeouts.
| NAME | SEASON | TM | G | W | L | W% | GS | ERA | SO | CG | SHO | SV | IP | 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 |  | B. Bello | 2022 |  BOS | 13 | 2 | 8 | .200 | 11 | 4.71 | 55 | 1 | 0 | 0 | 57.1 | 75 | 30 | 34 | 1 | 27 | 2 | 0 | 1 | 268 | 2 | 8.63 | 4.24 | 2.04 | 0.16 | 20.5 | 10.1 | 1.78 | .404 | 5.34 | 115 | 2.93 | 74 | 11.77 | 6.6 |
| 2 | | B. Bello | 2023 | BOS | 28 | 12 | 11 | .522 | 28 | 4.24 | 132 | 0 | 0 | 0 | 157.0 | 165 | 74 | 77 | 24 | 45 | 6 | 0 | 0 | 668 | 1 | 7.57 | 2.58 | 2.93 | 1.38 | 19.8 | 6.7 | 1.34 | .306 | 4.41 | 94 | 4.53 | 105 | 9.46 | -3.5 |
| 3 | | B. Bello | 2024 | BOS | 30 | 14 | 8 | .636 | 30 | 4.49 | 153 | 0 | 0 | 0 | 162.1 | 157 | 81 | 84 | 19 | 64 | 11 | 0 | 0 | 702 | 6 | 8.48 | 3.55 | 2.39 | 1.05 | 21.8 | 9.1 | 1.36 | .303 | 4.66 | 106 | 4.18 | 101 | 8.70 | -0.9 |
| 4 | | B. Bello | 2025 | BOS | 21 | 8 | 6 | .571 | 20 | 3.25 | 95 | 1 | 0 | 0 | 121.2 | 112 | 44 | 50 | 12 | 45 | 9 | 0 | 0 | 514 | 2 | 7.03 | 3.33 | 2.11 | 0.89 | 18.5 | 8.8 | 1.29 | .283 | 3.70 | 76 | 4.15 | 99 | 8.28 | 0.7 |
| Total | 92 | 36 | 33 | .522 | 89 | 4.14 | 435 | 2 | 0 | 0 | 498.1 | 509 | 229 | 245 | 56 | 181 | 28 | 0 | 1 | 2,152 | 11 | 7.86 | 3.27 | 2.40 | 1.01 | 20.2 | 8.4 | 1.38 | .312 | 4.42 | 96 | 4.14 | 99 | 9.19 | 2.9 |
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