Jeffrey Springs had the best ERA in the AL with an ERA worse than 0.00 in 2023, with an ERA of 0.56.
| NAME | ERA | SEASON | TM | G | W | L | W% | GS | 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 |  | J. Springs | 0.56 | 2023 |  TBR | 3 | 2 | 0 | 1.000 | 3 | 24 | 0 | 0 | 0 | 16.0 | 4 | 1 | 1 | 1 | 4 | 0 | 0 | 0 | 55 | 0 | 13.50 | 2.25 | 6.00 | 0.56 | 43.6 | 7.3 | 0.50 | .115 | 0.56 | 14 | 1.81 | 44 | 2.25 | 4.3 |
| 2 | | M. DÃaz | 0.64 | 2023 |  DET | 12 | 1 | 0 | 1.000 | 3 | 16 | 0 | 0 | 0 | 14.0 | 8 | 1 | 1 | 0 | 5 | 0 | 0 | 0 | 54 | 0 | 10.29 | 3.21 | 3.20 | 0.00 | 29.6 | 9.3 | 0.93 | .242 | 0.64 | 15 | 2.04 | 48 | 5.14 | 3.5 |
| 3 | | B. Stewart | 0.65 | 2023 |  MIN | 28 | 2 | 0 | 1.000 | 0 | 39 | 0 | 0 | 1 | 27.2 | 19 | 2 | 2 | 1 | 11 | 1 | 5 | 3 | 109 | 1 | 12.69 | 3.58 | 3.55 | 0.33 | 35.8 | 10.1 | 1.08 | .316 | 0.65 | 15 | 2.20 | 51 | 6.18 | 6.4 |
| 4 | | K. Funderburk | 0.75 | 2023 | MIN | 11 | 2 | 0 | 1.000 | 0 | 19 | 0 | 0 | 0 | 12.0 | 6 | 1 | 1 | 1 | 5 | 1 | 4 | 0 | 47 | 0 | 14.25 | 3.75 | 3.80 | 0.75 | 40.4 | 10.6 | 0.92 | .238 | 0.75 | 18 | 2.67 | 62 | 4.50 | 2.2 |
| 5 | | C. Martin | 1.05 | 2023 |  BOS | 55 | 4 | 1 | .800 | 0 | 46 | 0 | 0 | 3 | 51.1 | 45 | 6 | 6 | 2 | 8 | 0 | 12 | 3 | 199 | 1 | 8.06 | 1.40 | 5.75 | 0.35 | 23.1 | 4.0 | 1.03 | .301 | 1.05 | 23 | 2.43 | 56 | 7.89 | 10.7 |
| 6 | | P. Murfee | 1.29 | 2023 |  SEA | 16 | 1 | 2 | .333 | 0 | 16 | 0 | 0 | 0 | 14.0 | 5 | 2 | 5 | 1 | 10 | 1 | 3 | 3 | 58 | 0 | 10.29 | 6.43 | 1.60 | 0.64 | 27.6 | 17.2 | 1.07 | .133 | 3.21 | 32 | 4.25 | 103 | 3.21 | -0.3 |
| 7 | | S. Armstrong | 1.38 | 2023 | TBR | 39 | 1 | 0 | 1.000 | 6 | 54 | 0 | 0 | 0 | 52.0 | 36 | 8 | 12 | 2 | 11 | 4 | 5 | 0 | 207 | 0 | 9.35 | 1.90 | 4.91 | 0.35 | 26.1 | 5.3 | 0.90 | .250 | 2.08 | 34 | 2.54 | 61 | 6.23 | 9.5 |
| 8 | | F. Bautista | 1.48 | 2023 |  BAL | 56 | 8 | 2 | .800 | 0 | 110 | 0 | 0 | 33 | 61.0 | 30 | 10 | 14 | 4 | 26 | 2 | 46 | 0 | 237 | 7 | 16.23 | 3.84 | 4.23 | 0.59 | 46.4 | 11.0 | 0.92 | .274 | 2.07 | 35 | 1.87 | 45 | 4.43 | 16 |
| 9 | | T. Mayza | 1.52 | 2023 |  TOR | 69 | 3 | 1 | .750 | 0 | 53 | 0 | 0 | 1 | 53.1 | 50 | 9 | 10 | 2 | 15 | 0 | 8 | 3 | 215 | 1 | 8.94 | 2.53 | 3.53 | 0.34 | 24.7 | 7.0 | 1.22 | .331 | 1.69 | 36 | 2.60 | 61 | 8.44 | 10 |
| 10 | | J. Boyle | 1.69 | 2023 |  OAK | 3 | 2 | 0 | 1.000 | 3 | 15 | 0 | 0 | 0 | 16.0 | 8 | 3 | 4 | 1 | 5 | 0 | 0 | 0 | 60 | 0 | 8.44 | 2.81 | 3.00 | 0.56 | 25.0 | 8.3 | 0.81 | .179 | 2.25 | 41 | 3.13 | 75 | 4.50 | 1.9 |
| 11 | | H. Neris | 1.71 | 2023 |  HOU | 71 | 6 | 3 | .667 | 0 | 77 | 0 | 0 | 2 | 68.1 | 41 | 13 | 16 | 7 | 31 | 3 | 7 | 0 | 273 | 3 | 10.14 | 4.08 | 2.48 | 0.92 | 28.2 | 11.4 | 1.05 | .219 | 2.11 | 40 | 3.82 | 90 | 5.40 | 3.2 |
| 12 | | B. Francis | 1.73 | 2023 | TOR | 20 | 1 | 0 | 1.000 | 0 | 35 | 0 | 0 | 1 | 36.1 | 22 | 7 | 7 | 5 | 8 | 1 | 11 | 0 | 136 | 1 | 8.67 | 1.98 | 4.38 | 1.24 | 25.7 | 5.9 | 0.83 | .195 | 1.73 | 41 | 3.86 | 90 | 5.45 | 1.7 |
| 13 | | B. Abreu | 1.75 | 2023 | HOU | 72 | 3 | 2 | .600 | 0 | 100 | 0 | 0 | 5 | 72.0 | 44 | 14 | 17 | 6 | 31 | 3 | 16 | 0 | 287 | 1 | 12.50 | 3.88 | 3.23 | 0.75 | 34.8 | 10.8 | 1.04 | .259 | 2.13 | 41 | 2.97 | 70 | 5.50 | 10.2 |
| 14 | | J. Krehbiel | 1.80 | 2023 | BAL | 6 | 1 | 0 | 1.000 | 0 | 5 | 0 | 0 | 0 | 5.0 | 2 | 1 | 1 | 1 | 2 | 0 | 4 | 0 | 19 | 0 | 9.00 | 3.60 | 2.50 | 1.80 | 26.3 | 10.5 | 0.80 | .091 | 1.80 | 43 | 5.05 | 120 | 3.60 | -0.5 |
| 15 | | T. Milone | 2.00 | 2023 | SEA | 2 | 0 | 1 | .000 | 2 | 3 | 0 | 0 | 0 | 9.0 | 7 | 2 | 3 | 1 | 6 | 0 | 0 | 0 | 40 | 0 | 3.00 | 6.00 | 0.50 | 1.00 | 7.5 | 15.0 | 1.44 | .200 | 3.00 | 50 | 6.03 | 147 | 7.00 | -2 |
| 16 | | T. Thornton | 2.01 | 2023 | TOT | 27 | 1 | 2 | .333 | 1 | 26 | 0 | 0 | 0 | 31.1 | 30 | 7 | 12 | 5 | 6 | 0 | 6 | 0 | 125 | 0 | 7.47 | 1.72 | 4.33 | 1.44 | 20.8 | 4.8 | 1.15 | .284 | 3.45 | 50 | 4.24 | 103 | 8.62 | -0.5 |
| 17 | | J. La Sorsa | 2.08 | 2023 | TBR | 2 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 4.1 | 3 | 1 | 1 | 0 | 3 | 1 | 1 | 0 | 20 | 0 | 6.23 | 6.23 | 1.00 | 0.00 | 15.0 | 15.0 | 1.38 | .231 | 2.08 | 51 | 4.64 | 112 | 6.23 | -0.2 | |
| 18 | | Y. Cano | 2.11 | 2023 | BAL | 72 | 1 | 4 | .200 | 0 | 65 | 0 | 0 | 8 | 72.2 | 60 | 17 | 19 | 4 | 13 | 3 | 20 | 2 | 283 | 2 | 8.05 | 1.61 | 5.00 | 0.50 | 23.0 | 4.6 | 1.00 | .283 | 2.35 | 50 | 2.84 | 68 | 7.43 | 11.1 |
| 19 | | T. Holton | 2.11 | 2023 | DET | 59 | 3 | 2 | .600 | 1 | 74 | 0 | 0 | 1 | 85.1 | 56 | 20 | 21 | 9 | 18 | 1 | 7 | 1 | 324 | 4 | 7.80 | 1.90 | 4.11 | 0.95 | 22.8 | 5.6 | 0.87 | .212 | 2.21 | 50 | 3.56 | 84 | 5.91 | 6.5 |
| 20 | | J. Jackson | 2.12 | 2023 | TOR | 25 | 3 | 1 | .750 | 0 | 27 | 0 | 0 | 0 | 29.2 | 18 | 7 | 8 | 4 | 9 | 1 | 10 | 2 | 116 | 1 | 8.19 | 2.73 | 3.00 | 1.21 | 23.3 | 7.8 | 0.91 | .187 | 2.43 | 50 | 4.20 | 98 | 5.46 | 0.3 |
| 21 | | D. Daniel | 2.19 | 2023 |  LAA | 3 | 0 | 1 | .000 | 0 | 9 | 0 | 0 | 0 | 12.1 | 7 | 3 | 3 | 1 | 9 | 0 | 1 | 0 | 52 | 1 | 6.57 | 6.57 | 1.00 | 0.73 | 17.3 | 17.3 | 1.30 | .182 | 2.19 | 50 | 5.04 | 114 | 5.11 | -0.8 |
| 22 | | C. Poche | 2.23 | 2023 | TBR | 66 | 12 | 3 | .800 | 0 | 61 | 0 | 0 | 1 | 60.2 | 42 | 15 | 17 | 4 | 24 | 1 | 6 | 1 | 246 | 3 | 9.05 | 3.56 | 2.54 | 0.59 | 24.8 | 9.8 | 1.09 | .244 | 2.52 | 54 | 3.33 | 80 | 6.23 | 5.6 |
| 23 | | I. Kiner-Falefa | 2.25 | 2023 |  NYY | 4 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 4.0 | 4 | 1 | 1 | 0 | 0 | 0 | 4 | 0 | 16 | 0 | 2.25 | 0.00 | 0.00 | 6.3 | 0.0 | 1.00 | .267 | 2.25 | 53 | 2.75 | 62 | 9.00 | 0.7 | ||
| 24 | | J. McMillon | 2.25 | 2023 |  KCR | 4 | 0 | 0 | 0 | 8 | 0 | 0 | 0 | 4.0 | 1 | 1 | 1 | 1 | 0 | 0 | 3 | 0 | 13 | 0 | 18.00 | 0.00 | 2.25 | 61.5 | 0.0 | 0.25 | .000 | 2.25 | 50 | 2.50 | 58 | 2.25 | 0.8 | ||
| 25 | | R. Stephenson | 2.35 | 2023 | TBR | 42 | 3 | 1 | .750 | 0 | 60 | 0 | 0 | 1 | 38.1 | 18 | 10 | 11 | 5 | 8 | 0 | 10 | 1 | 140 | 4 | 14.09 | 1.88 | 7.50 | 1.17 | 42.9 | 5.7 | 0.68 | .194 | 2.58 | 57 | 2.44 | 59 | 4.23 | 7.5 |
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