Brayan Bello has played 4 seasons for the Red Sox. He has 29 wins, 27 losses, an ERA of 4.39 and 343 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 | 1 | 1 | 0 | 1.000 | 1 | 1.80 | 3 | 0 | 0 | 0 | 5.0 | 4 | 1 | 1 | 1 | 3 | 2 | 0 | 0 | 22 | 0 | 5.40 | 5.40 | 1.00 | 1.80 | 13.6 | 13.6 | 1.40 | .231 | 1.80 | 44 | 7.43 | 184 | 7.20 | -1.9 |
| Total | 72 | 29 | 27 | .518 | 70 | 4.39 | 343 | 1 | 0 | 0 | 381.2 | 401 | 186 | 196 | 45 | 139 | 21 | 0 | 1 | 1,660 | 9 | 8.09 | 3.28 | 2.47 | 1.06 | 20.7 | 8.4 | 1.41 | .320 | 4.62 | 101 | 4.18 | 100 | 9.46 | 0.3 |
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