Joel Johnston had the lowest ERA with an ERA worse than 0.00 in 1991, with an ERA of 0.40 in his rookie season.
| 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. Johnston | 0.40 | 1991 | 13 | 1 | 0 | 1.000 | 0 | 21 | 0 | 0 | 0 | 22.1 | 9 | 1 | 1 | 0 | 9 | 0 | 1 | 3 | 85 | 0 | 8.46 | 3.63 | 2.33 | 0.00 | 24.7 | 10.6 | 0.81 | .164 | 0.40 | 10 | 2.18 | 56 | 3.63 | 4.4 | |
| 2 | | E. Bell | 0.50 | 1991 | 10 | 4 | 0 | 1.000 | 0 | 7 | 0 | 0 | 0 | 18.0 | 5 | 1 | 2 | 0 | 5 | 1 | 3 | 0 | 61 | 0 | 3.50 | 2.50 | 1.40 | 0.00 | 11.5 | 8.2 | 0.56 | .104 | 1.00 | 12 | 3.07 | 77 | 2.50 | 1.9 | |
| 3 | | D. Cook | 0.51 | 1991 | 20 | 1 | 0 | 1.000 | 1 | 8 | 0 | 0 | 0 | 17.2 | 12 | 1 | 3 | 0 | 7 | 0 | 5 | 1 | 69 | 0 | 4.08 | 3.57 | 1.14 | 0.00 | 11.6 | 10.1 | 1.08 | .222 | 1.53 | 14 | 3.13 | 85 | 6.11 | 1.1 | |
| 4 | | D. Henry | 1.00 | 1991 | 32 | 2 | 1 | .667 | 0 | 28 | 0 | 0 | 15 | 36.0 | 16 | 4 | 4 | 1 | 14 | 0 | 25 | 1 | 137 | 0 | 7.00 | 3.50 | 2.00 | 0.25 | 20.4 | 10.2 | 0.83 | .160 | 1.00 | 25 | 2.82 | 71 | 4.00 | 4.6 | |
| 5 | | B. Manuel | 1.13 | 1991 | 8 | 1 | 0 | 1.000 | 0 | 5 | 0 | 0 | 0 | 16.0 | 7 | 2 | 2 | 0 | 6 | 0 | 5 | 0 | 58 | 2 | 2.81 | 3.38 | 0.83 | 0.00 | 8.6 | 10.3 | 0.81 | .149 | 1.13 | 28 | 3.35 | 84 | 3.94 | 1.2 | |
| 6 | | E. Valdez | 1.50 | 1991 | 7 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 6.0 | 5 | 1 | 1 | 0 | 3 | 1 | 0 | 1 | 27 | 0 | 1.50 | 4.50 | 0.33 | 0.00 | 3.7 | 11.1 | 1.33 | .227 | 1.50 | 37 | 4.52 | 113 | 7.50 | -0.3 | ||
| 7 | | B. Harvey | 1.60 | 1991 | 67 | 2 | 4 | .333 | 0 | 101 | 0 | 0 | 46 | 78.2 | 51 | 14 | 20 | 6 | 17 | 1 | 63 | 3 | 309 | 2 | 11.56 | 1.94 | 5.94 | 0.69 | 32.7 | 5.5 | 0.86 | .245 | 2.29 | 39 | 1.96 | 48 | 5.83 | 18.6 | |
| 8 | | S. Howe | 1.68 | 1991 | 37 | 3 | 1 | .750 | 0 | 34 | 0 | 0 | 3 | 48.1 | 39 | 9 | 12 | 1 | 7 | 3 | 10 | 2 | 189 | 2 | 6.33 | 1.30 | 4.86 | 0.19 | 18.0 | 3.7 | 0.95 | .264 | 2.23 | 41 | 2.33 | 57 | 7.26 | 9.5 | |
| 9 | | T. Bross | 1.80 | 1991 | 8 | 0 | 0 | 0 | 5 | 0 | 0 | 0 | 10.0 | 7 | 2 | 2 | 1 | 3 | 0 | 4 | 0 | 39 | 0 | 4.50 | 2.70 | 1.67 | 0.90 | 12.8 | 7.7 | 1.00 | .200 | 1.80 | 50 | 4.05 | 109 | 6.30 | -0.4 | ||
| 10 | | S. Wapnick | 1.80 | 1991 | 6 | 0 | 1 | .000 | 0 | 1 | 0 | 0 | 0 | 5.0 | 2 | 1 | 1 | 0 | 4 | 0 | 4 | 0 | 22 | 0 | 1.80 | 7.20 | 0.25 | 0.00 | 4.5 | 18.2 | 1.20 | .118 | 1.80 | 45 | 4.85 | 121 | 3.60 | -0.5 | |
| 11 | | T. Frohwirth | 1.87 | 1991 | 51 | 7 | 3 | .700 | 0 | 77 | 0 | 0 | 3 | 96.1 | 64 | 20 | 24 | 2 | 29 | 1 | 10 | 3 | 372 | 0 | 7.19 | 2.71 | 2.66 | 0.19 | 20.7 | 7.8 | 0.97 | .236 | 2.24 | 47 | 2.46 | 61 | 5.98 | 17 | |
| 12 | | S. Foster | 1.93 | 1991 | 11 | 0 | 0 | 0 | 11 | 0 | 0 | 0 | 14.0 | 7 | 3 | 5 | 1 | 4 | 0 | 5 | 0 | 53 | 0 | 7.07 | 2.57 | 2.75 | 0.64 | 20.8 | 7.5 | 0.79 | .162 | 3.21 | 51 | 3.06 | 79 | 4.50 | 1.3 | ||
| 13 | | C. McElroy | 1.95 | 1991 | 71 | 6 | 2 | .750 | 0 | 92 | 0 | 0 | 3 | 101.1 | 73 | 22 | 33 | 7 | 57 | 0 | 12 | 7 | 419 | 1 | 8.17 | 5.06 | 1.61 | 0.62 | 22.0 | 13.6 | 1.28 | .251 | 2.93 | 51 | 3.62 | 94 | 6.48 | 2.7 | |
| 14 | | M. Eichhorn | 1.98 | 1991 | 70 | 3 | 3 | .500 | 0 | 49 | 0 | 0 | 1 | 81.2 | 63 | 18 | 21 | 2 | 13 | 2 | 23 | 1 | 311 | 0 | 5.40 | 1.43 | 3.77 | 0.22 | 15.8 | 4.2 | 0.93 | .249 | 2.31 | 48 | 2.52 | 61 | 6.94 | 14.3 | |
| 15 | | B. Swift | 1.99 | 1991 | 71 | 1 | 2 | .333 | 0 | 48 | 0 | 0 | 17 | 90.1 | 74 | 20 | 22 | 3 | 26 | 1 | 30 | 4 | 359 | 2 | 4.78 | 2.59 | 1.85 | 0.30 | 13.4 | 7.2 | 1.11 | .253 | 2.19 | 48 | 3.12 | 77 | 7.37 | 9.3 | |
| 16 | | S. Radinsky | 2.02 | 1991 | 67 | 5 | 5 | .500 | 0 | 49 | 0 | 0 | 8 | 71.1 | 53 | 16 | 18 | 4 | 23 | 1 | 19 | 2 | 289 | 0 | 6.18 | 2.90 | 2.13 | 0.50 | 17.0 | 8.0 | 1.07 | .231 | 2.27 | 51 | 3.21 | 80 | 6.69 | 6.3 | |
| 17 | | Y. Perez | 2.08 | 1991 | 3 | 1 | 0 | 1.000 | 0 | 3 | 0 | 0 | 0 | 4.1 | 2 | 1 | 1 | 0 | 2 | 0 | 0 | 0 | 16 | 2 | 6.23 | 4.15 | 1.50 | 0.00 | 18.8 | 12.5 | 0.92 | .182 | 2.08 | 54 | 2.85 | 74 | 4.15 | 0.5 | |
| 18 | | M. Walker | 2.08 | 1991 | 5 | 0 | 1 | .000 | 0 | 2 | 0 | 0 | 0 | 4.1 | 6 | 1 | 1 | 0 | 2 | 1 | 3 | 1 | 22 | 0 | 4.15 | 4.15 | 1.00 | 0.00 | 9.1 | 9.1 | 1.85 | .353 | 2.08 | 51 | 4.00 | 100 | 12.46 | 0 | |
| 19 | | S. Farr | 2.19 | 1991 | 60 | 5 | 5 | .500 | 0 | 60 | 0 | 0 | 23 | 70.0 | 57 | 17 | 19 | 4 | 20 | 5 | 48 | 3 | 285 | 2 | 7.71 | 2.57 | 3.00 | 0.51 | 21.1 | 7.0 | 1.10 | .270 | 2.44 | 53 | 2.95 | 72 | 7.33 | 9 | |
| 20 | | G. Harris | 2.23 | 1991 | 20 | 9 | 5 | .643 | 20 | 95 | 3 | 2 | 0 | 133.0 | 116 | 33 | 42 | 16 | 27 | 1 | 0 | 6 | 537 | 2 | 6.43 | 1.83 | 3.52 | 1.08 | 17.7 | 5.0 | 1.08 | .251 | 2.84 | 60 | 3.62 | 94 | 7.85 | 3.6 | |
| 21 | | J. Berenguer | 2.24 | 1991 | 49 | 0 | 3 | .000 | 0 | 53 | 0 | 0 | 17 | 64.1 | 43 | 16 | 18 | 5 | 20 | 3 | 35 | 2 | 255 | 0 | 7.41 | 2.80 | 2.65 | 0.70 | 20.8 | 7.8 | 0.98 | .218 | 2.52 | 58 | 3.29 | 86 | 6.02 | 3.8 | |
| 22 | | K. Brown | 2.25 | 1991 | 11 | 0 | 0 | 0 | 4 | 0 | 0 | 0 | 12.0 | 15 | 3 | 4 | 0 | 6 | 0 | 3 | 1 | 56 | 1 | 3.00 | 4.50 | 0.67 | 0.00 | 7.1 | 10.7 | 1.75 | .326 | 3.00 | 60 | 3.68 | 95 | 11.25 | 0.3 | ||
| 23 | | L. Andersen | 2.30 | 1991 | 38 | 3 | 4 | .429 | 0 | 40 | 0 | 0 | 13 | 47.0 | 39 | 12 | 13 | 0 | 13 | 0 | 24 | 3 | 188 | 1 | 7.66 | 2.49 | 3.08 | 0.00 | 21.3 | 6.9 | 1.11 | .289 | 2.49 | 62 | 1.98 | 51 | 7.47 | 9.6 | |
| 24 | | J. Habyan | 2.30 | 1991 | 66 | 4 | 2 | .667 | 0 | 70 | 0 | 0 | 2 | 90.0 | 73 | 23 | 28 | 2 | 20 | 2 | 16 | 2 | 349 | 1 | 7.00 | 2.00 | 3.50 | 0.20 | 20.1 | 5.7 | 1.03 | .278 | 2.80 | 56 | 2.32 | 56 | 7.30 | 17.8 | |
| 25 | | T. Henke | 2.32 | 1991 | 49 | 0 | 2 | .000 | 0 | 53 | 0 | 0 | 32 | 50.1 | 33 | 13 | 13 | 4 | 11 | 0 | 43 | 2 | 190 | 1 | 9.48 | 1.97 | 4.82 | 0.72 | 27.9 | 5.8 | 0.87 | .238 | 2.32 | 56 | 2.43 | 58 | 5.90 | 9.5 | |
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| NL East | W | L | PCT | GB |
|---|---|---|---|---|
74 | 51 | .592 | ||
68 | 58 | .540 | 6.5 | |
64 | 62 | .508 | 10.5 | |
60 | 66 | .476 | 14.5 | |
57 | 69 | .452 | 17.5 | |
| NL Central | W | L | PCT | GB |
77 | 48 | .616 | ||
73 | 53 | .579 | 4.5 | |
64 | 62 | .508 | 13.5 | |
61 | 66 | .480 | 17.0 | |
60 | 65 | .480 | 17.0 | |
| NL West | W | L | PCT | GB |
75 | 51 | .595 | ||
67 | 59 | .532 | 8.0 | |
66 | 60 | .524 | 9.0 | |
51 | 73 | .411 | 23.0 | |
50 | 75 | .400 | 24.5 |
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Rockies| AL East | W | L | PCT | GB |
|---|---|---|---|---|
75 | 49 | .605 | ||
69 | 55 | .556 | 6.0 | |
67 | 58 | .536 | 8.5 | |
61 | 64 | .488 | 14.5 | |
61 | 65 | .484 | 15.0 | |
| AL Central | W | L | PCT | GB |
65 | 59 | .524 | ||
61 | 64 | .488 | 4.5 | |
61 | 65 | .484 | 5.0 | |
60 | 65 | .480 | 5.5 | |
52 | 74 | .413 | 14.0 | |
| AL West | W | L | PCT | GB |
63 | 62 | .504 | ||
61 | 64 | .488 | 2.0 | |
59 | 66 | .472 | 4.0 | |
49 | 76 | .392 | 14.0 | |
49 | 76 | .392 | 14.0 |
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