Brandon Williamson allowed the most home runs by a Reds left-hander in 2023, with 18 HR in his rookie season.
| NAME | HR | SEASON | TM | G | W | L | W% | GS | ERA | SO | CG | SHO | SV | IP | H | ER | R | 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. Williamson | 18 | 2023 |  CIN | 23 | 5 | 4 | .556 | 23 | 4.46 | 98 | 0 | 0 | 0 | 117.0 | 111 | 58 | 63 | 39 | 2 | 0 | 0 | 491 | 4 | 7.54 | 3.00 | 2.51 | 1.38 | 20.0 | 7.9 | 1.28 | .278 | 4.85 | 96 | 4.63 | 100 | 8.54 | 0.4 |
| 2 | | A. Abbott | 16 | 2023 | CIN | 21 | 8 | 5 | .615 | 21 | 3.87 | 120 | 0 | 0 | 0 | 109.1 | 100 | 47 | 47 | 44 | 1 | 0 | 0 | 459 | 1 | 9.88 | 3.62 | 2.73 | 1.32 | 26.1 | 9.6 | 1.32 | .302 | 3.87 | 83 | 4.19 | 90 | 8.23 | 5.3 |
| 3 | | A. Young | 10 | 2023 | CIN | 63 | 4 | 2 | .667 | 0 | 3.86 | 50 | 0 | 0 | 1 | 53.2 | 53 | 23 | 27 | 20 | 1 | 6 | 0 | 236 | 0 | 8.39 | 3.35 | 2.50 | 1.68 | 21.2 | 8.5 | 1.36 | .277 | 4.53 | 83 | 4.98 | 107 | 8.89 | -1.8 |
| 4 | | N. Lodolo | 10 | 2023 | CIN | 7 | 2 | 1 | .667 | 7 | 6.29 | 47 | 0 | 0 | 0 | 34.1 | 50 | 24 | 24 | 10 | 7 | 0 | 1 | 166 | 2 | 12.32 | 2.62 | 4.70 | 2.62 | 28.3 | 6.0 | 1.75 | .435 | 6.29 | 136 | 5.79 | 125 | 13.11 | -4.1 |
| 5 | | R. Sanmartin | 2 | 2023 | CIN | 14 | 1 | 0 | 1.000 | 0 | 7.07 | 13 | 0 | 0 | 0 | 14.0 | 17 | 11 | 13 | 10 | 0 | 3 | 0 | 70 | 2 | 8.36 | 6.43 | 1.30 | 1.29 | 18.6 | 14.3 | 1.93 | .333 | 8.36 | 152 | 5.39 | 116 | 10.93 | -1.1 |
| 6 | | S. Moll | 1 | 2023 | CIN | 25 | 2 | 0 | 1.000 | 0 | 0.73 | 22 | 0 | 0 | 0 | 24.2 | 13 | 2 | 2 | 11 | 0 | 3 | 4 | 98 | 0 | 8.03 | 4.01 | 2.00 | 0.36 | 22.4 | 11.2 | 0.97 | .188 | 0.73 | 16 | 3.33 | 72 | 4.74 | 3.4 |
| 7 | | C. Shreve | 1 | 2023 | CIN | 3 | 0 | 0 | 0 | 2.70 | 3 | 0 | 0 | 0 | 3.1 | 1 | 1 | 1 | 2 | 0 | 0 | 0 | 13 | 0 | 8.10 | 5.40 | 1.50 | 2.70 | 23.1 | 15.4 | 0.90 | .000 | 2.70 | 58 | 7.15 | 154 | 2.70 | -0.9 |
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