Between the 1970 and 1979 seasons, Roric Harrison had the lowest ERA for the Orioles, with an ERA of 2.30.
Interpreted as:
1970s orioles era with a minimum of 0.5 IP per team game leaders| NAME | ERA | 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 |  | R. Harrison | 2.30 | 39 | 3 | 4 | .429 | 2 | 62 | 0 | 0 | 4 | 94.0 | 68 | 24 | 24 | 2 | 34 | 4 | 14 | 9 | 372 | 8 | 5.94 | 3.26 | 1.82 | 0.19 | 16.7 | 9.1 | 1.09 | .244 | 2.30 | 77 | 2.56 | 82 | 6.51 | 5.9 |
| 2 | | J. Palmer | 2.58 | 355 | 186 | 103 | .644 | 352 | 1,559 | 175 | 44 | 2 | 2745.0 | 2,275 | 787 | 883 | 184 | 861 | 26 | 3 | 31 | 11,105 | 55 | 5.11 | 2.82 | 1.81 | 0.60 | 14.0 | 7.8 | 1.14 | .247 | 2.90 | 73 | 3.28 | 90 | 7.46 | 110.6 |
| 3 | | P. Dobson | 2.78 | 76 | 36 | 26 | .581 | 73 | 348 | 31 | 7 | 1 | 550.2 | 468 | 170 | 193 | 37 | 132 | 6 | 2 | 9 | 2,199 | 12 | 5.69 | 2.16 | 2.64 | 0.60 | 15.8 | 6.0 | 1.09 | .257 | 3.15 | 86 | 2.78 | 83 | 7.65 | 34.7 |
| 4 | | K. Holtzman | 2.86 | 13 | 5 | 4 | .556 | 13 | 25 | 6 | 1 | 0 | 97.2 | 100 | 31 | 34 | 4 | 35 | 1 | 0 | 2 | 414 | 3 | 2.30 | 3.23 | 0.71 | 0.37 | 6.0 | 8.5 | 1.38 | .275 | 3.13 | 87 | 3.75 | 110 | 9.22 | -3.8 |
| 5 | | W. Garland | 3.00 | 91 | 27 | 18 | .600 | 33 | 209 | 14 | 4 | 6 | 426.2 | 386 | 142 | 163 | 23 | 128 | 10 | 33 | 18 | 1,763 | 8 | 4.41 | 2.70 | 1.63 | 0.49 | 11.9 | 7.3 | 1.20 | .261 | 3.44 | 88 | 3.29 | 94 | 8.14 | 9.8 |
| 6 | | M. Torrez | 3.06 | 36 | 20 | 9 | .690 | 36 | 119 | 16 | 2 | 0 | 270.2 | 238 | 92 | 103 | 15 | 133 | 5 | 0 | 5 | 1,144 | 10 | 3.96 | 4.42 | 0.89 | 0.50 | 10.4 | 11.6 | 1.37 | .256 | 3.42 | 85 | 3.95 | 107 | 7.91 | -8.3 |
| 7 | | T. Phoebus | 3.07 | 27 | 5 | 5 | .500 | 21 | 72 | 3 | 0 | 0 | 135.0 | 106 | 46 | 58 | 11 | 62 | 6 | 2 | 2 | 567 | 7 | 4.80 | 4.13 | 1.16 | 0.73 | 12.7 | 10.9 | 1.24 | .228 | 3.87 | 83 | 4.14 | 107 | 7.07 | -3.9 |
| 8 | | D. McNally | 3.18 | 183 | 91 | 58 | .611 | 181 | 594 | 69 | 16 | 1 | 1286.1 | 1,192 | 455 | 486 | 103 | 366 | 27 | 1 | 32 | 5,252 | 23 | 4.16 | 2.56 | 1.62 | 0.72 | 11.3 | 7.0 | 1.21 | .262 | 3.40 | 92 | 3.56 | 100 | 8.34 | 0 |
| 9 | | M. Cuellar | 3.31 | 251 | 120 | 77 | .609 | 244 | 829 | 115 | 25 | 1 | 1737.2 | 1,596 | 639 | 716 | 156 | 522 | 7 | 4 | 26 | 7,131 | 34 | 4.29 | 2.70 | 1.59 | 0.81 | 11.6 | 7.3 | 1.22 | .256 | 3.71 | 95 | 3.66 | 103 | 8.27 | -19.2 |
| 10 | | D. Alexander | 3.41 | 137 | 35 | 37 | .486 | 64 | 215 | 19 | 4 | 3 | 593.0 | 559 | 225 | 260 | 41 | 196 | 13 | 43 | 26 | 2,472 | 22 | 3.26 | 2.97 | 1.10 | 0.62 | 8.7 | 7.9 | 1.27 | .258 | 3.95 | 98 | 3.77 | 107 | 8.48 | -17.7 |
| 11 | | S. McGregor | 3.57 | 94 | 31 | 25 | .554 | 62 | 236 | 21 | 6 | 5 | 536.1 | 518 | 213 | 232 | 46 | 105 | 10 | 17 | 5 | 2,185 | 8 | 3.96 | 1.76 | 2.25 | 0.77 | 10.8 | 4.8 | 1.16 | .264 | 3.89 | 96 | 3.53 | 91 | 8.69 | 20.1 |
| 12 | | M. Flanagan | 3.63 | 137 | 60 | 40 | .600 | 122 | 569 | 52 | 9 | 1 | 876.2 | 843 | 354 | 380 | 69 | 266 | 8 | 9 | 9 | 3,619 | 21 | 5.84 | 2.73 | 2.14 | 0.71 | 15.7 | 7.4 | 1.27 | .286 | 3.90 | 98 | 3.33 | 87 | 8.65 | 51.4 |
| 13 | | D. Martinez | 3.67 | 126 | 46 | 36 | .561 | 92 | 399 | 39 | 5 | 4 | 763.0 | 716 | 311 | 344 | 59 | 243 | 12 | 20 | 10 | 3,161 | 23 | 4.71 | 2.87 | 1.64 | 0.70 | 12.6 | 7.7 | 1.26 | .268 | 4.06 | 97 | 3.63 | 93 | 8.45 | 22.2 |
| 14 | | R. Grimsley | 3.67 | 137 | 50 | 43 | .538 | 124 | 341 | 38 | 7 | 1 | 847.2 | 850 | 346 | 377 | 87 | 232 | 6 | 7 | 14 | 3,521 | 19 | 3.62 | 2.46 | 1.47 | 0.92 | 9.7 | 6.6 | 1.28 | .267 | 4.00 | 104 | 3.99 | 109 | 9.02 | -36.1 |
| 15 | | R. May | 3.68 | 61 | 29 | 21 | .580 | 58 | 176 | 16 | 5 | 0 | 404.0 | 399 | 165 | 187 | 36 | 120 | 5 | 1 | 5 | 1,684 | 3 | 3.92 | 2.67 | 1.47 | 0.80 | 10.5 | 7.1 | 1.28 | .269 | 4.17 | 103 | 3.91 | 105 | 8.89 | -9.6 |
| 16 | | S. Stone | 3.77 | 32 | 11 | 7 | .611 | 32 | 96 | 3 | 0 | 0 | 186.0 | 173 | 78 | 91 | 31 | 73 | 1 | 0 | 1 | 781 | 3 | 4.65 | 3.53 | 1.32 | 1.50 | 12.3 | 9.3 | 1.32 | .245 | 4.40 | 94 | 5.05 | 123 | 8.37 | -20.2 |
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