Between the 2020 and 2023 seasons, Jordan Romano had the lowest ERA for the Blue Jays when pitching at least 200 innings, with an ERA of 2.29.
| NAME | ERA | IP | G | W | L | W% | GS | 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 |  | J. Romano | 2.29 | 200.2 | 199 | 19 | 13 | .594 | 0 | 251 | 0 | 0 | 97 | 141 | 51 | 58 | 19 | 75 | 7 | 147 | 9 | 816 | 2 | 11.26 | 3.36 | 3.35 | 0.85 | 30.8 | 9.2 | 1.08 | .263 | 2.60 | 55 | 3.13 | 75 | 6.32 | 23.7 |
| 2 |  | R. Ray | 3.03 | 214.0 | 37 | 14 | 8 | .636 | 36 | 273 | 0 | 0 | 0 | 172 | 72 | 75 | 37 | 66 | 4 | 0 | 0 | 870 | 5 | 11.48 | 2.78 | 4.14 | 1.56 | 31.4 | 7.6 | 1.11 | .276 | 3.15 | 67 | 3.84 | 90 | 7.23 | 9.7 |
| 3 |  | K. Gausman | 3.25 | 359.2 | 62 | 24 | 19 | .558 | 62 | 442 | 0 | 0 | 0 | 351 | 130 | 144 | 34 | 83 | 4 | 0 | 0 | 1,488 | 5 | 11.06 | 2.08 | 5.33 | 0.85 | 29.7 | 5.6 | 1.21 | .343 | 3.60 | 81 | 2.68 | 64 | 8.78 | 58.5 |
| 4 |  | A. Manoah | 3.32 | 395.2 | 70 | 28 | 18 | .609 | 70 | 386 | 0 | 0 | 0 | 314 | 146 | 160 | 43 | 150 | 40 | 0 | 1 | 1,660 | 8 | 8.78 | 3.41 | 2.57 | 0.98 | 23.3 | 9.0 | 1.17 | .260 | 3.64 | 80 | 4.06 | 98 | 7.14 | 3.4 |
| 5 |  | C. Bassitt | 3.60 | 200.0 | 33 | 16 | 8 | .667 | 33 | 186 | 1 | 1 | 0 | 176 | 80 | 88 | 28 | 59 | 12 | 0 | 2 | 826 | 4 | 8.37 | 2.66 | 3.15 | 1.26 | 22.5 | 7.1 | 1.18 | .274 | 3.96 | 85 | 4.28 | 100 | 7.92 | 0.1 |
| 6 | | R. Stripling | 3.94 | 251.1 | 61 | 15 | 13 | .536 | 45 | 218 | 0 | 0 | 2 | 234 | 110 | 115 | 36 | 57 | 4 | 4 | 0 | 1,037 | 0 | 7.81 | 2.04 | 3.82 | 1.29 | 21.0 | 5.5 | 1.16 | .274 | 4.12 | 94 | 3.99 | 96 | 8.38 | 3.6 |
| 7 |  | H. Jin Ryu | 3.97 | 315.0 | 60 | 24 | 15 | .615 | 60 | 269 | 1 | 1 | 0 | 315 | 139 | 149 | 44 | 72 | 4 | 0 | 0 | 1,313 | 4 | 7.69 | 2.06 | 3.74 | 1.26 | 20.5 | 5.5 | 1.23 | .293 | 4.26 | 91 | 4.01 | 94 | 9.00 | 8.8 |
| 8 |  | J. BerrÃos | 4.27 | 432.0 | 76 | 28 | 23 | .549 | 76 | 411 | 0 | 0 | 0 | 436 | 205 | 215 | 62 | 110 | 27 | 0 | 3 | 1,826 | 7 | 8.56 | 2.29 | 3.74 | 1.29 | 22.5 | 6.0 | 1.26 | .308 | 4.48 | 105 | 4.09 | 99 | 9.08 | 4 |
| 9 |  | Y. Kikuchi | 4.36 | 268.1 | 64 | 17 | 13 | .567 | 52 | 305 | 0 | 0 | 1 | 258 | 130 | 145 | 50 | 106 | 13 | 4 | 0 | 1,154 | 10 | 10.23 | 3.56 | 2.88 | 1.68 | 26.4 | 9.2 | 1.36 | .306 | 4.86 | 108 | 4.68 | 112 | 8.65 | -14.3 |
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