Grant Balfour had the lowest ERA for the Oakland Athletics with 50.0+ innings pitched in 2011, with an ERA of 2.47.
| NAME | ERA | IP | SEASON | TM | 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 |  | G. Balfour | 2.47 | 62.0 | 2011 |  OAK | 62 | 5 | 2 | .714 | 0 | 59 | 0 | 0 | 2 | 44 | 17 | 17 | 8 | 20 | 0 | 15 | 1 | 242 | 0 | 8.56 | 2.90 | 2.95 | 1.16 | 24.4 | 8.3 | 1.03 | .232 | 2.47 | 62 | 3.76 | 95 | 6.39 | 1.3 |
| 2 | | G. Gonzalez | 3.12 | 202.0 | 2011 | OAK | 32 | 16 | 12 | .571 | 32 | 197 | 0 | 0 | 0 | 175 | 70 | 81 | 17 | 91 | 8 | 0 | 1 | 864 | 6 | 8.78 | 4.05 | 2.16 | 0.76 | 22.8 | 10.5 | 1.32 | .287 | 3.61 | 79 | 3.63 | 92 | 7.80 | 7.3 |
| 3 | | B. McCarthy | 3.32 | 170.2 | 2011 | OAK | 25 | 9 | 9 | .500 | 25 | 123 | 5 | 1 | 0 | 168 | 63 | 73 | 11 | 25 | 0 | 0 | 1 | 690 | 3 | 6.49 | 1.32 | 4.92 | 0.58 | 17.8 | 3.6 | 1.13 | .296 | 3.85 | 84 | 2.85 | 72 | 8.86 | 21.2 |
| 4 | | G. Moscoso | 3.38 | 128.0 | 2011 | OAK | 23 | 8 | 10 | .444 | 21 | 74 | 0 | 0 | 0 | 102 | 48 | 59 | 14 | 38 | 2 | 1 | 1 | 526 | 0 | 5.20 | 2.67 | 1.95 | 0.98 | 14.1 | 7.2 | 1.09 | .221 | 4.15 | 85 | 4.22 | 107 | 7.17 | -3.9 |
| 5 | | B. Fuentes | 3.70 | 58.1 | 2011 | OAK | 67 | 2 | 8 | .200 | 0 | 42 | 0 | 0 | 12 | 52 | 24 | 30 | 6 | 20 | 4 | 29 | 5 | 250 | 2 | 6.48 | 3.09 | 2.10 | 0.93 | 16.8 | 8.0 | 1.23 | .258 | 4.63 | 94 | 4.15 | 105 | 8.02 | -1.3 |
| 6 | | J. Outman | 3.70 | 58.1 | 2011 | OAK | 13 | 3 | 5 | .375 | 9 | 35 | 0 | 0 | 0 | 62 | 24 | 27 | 4 | 23 | 0 | 2 | 0 | 254 | 3 | 5.40 | 3.55 | 1.52 | 0.62 | 13.8 | 9.1 | 1.46 | .302 | 4.17 | 94 | 3.89 | 98 | 9.57 | 0.4 |
| 7 | | C. Breslow | 3.79 | 59.1 | 2011 | OAK | 67 | 0 | 2 | .000 | 0 | 44 | 0 | 0 | 0 | 69 | 25 | 29 | 4 | 21 | 2 | 10 | 1 | 261 | 3 | 6.67 | 3.19 | 2.10 | 0.61 | 16.9 | 8.0 | 1.52 | .342 | 4.40 | 96 | 3.57 | 90 | 10.47 | 2.5 |
| 8 | | B. Anderson | 4.00 | 83.1 | 2011 | OAK | 13 | 3 | 6 | .333 | 13 | 61 | 1 | 0 | 0 | 86 | 37 | 40 | 8 | 25 | 7 | 0 | 1 | 356 | 0 | 6.59 | 2.70 | 2.44 | 0.86 | 17.1 | 7.0 | 1.33 | .306 | 4.32 | 101 | 3.95 | 100 | 9.29 | 0 |
| 9 | | T. Cahill | 4.16 | 207.2 | 2011 | OAK | 34 | 12 | 14 | .462 | 34 | 147 | 0 | 0 | 0 | 214 | 96 | 102 | 19 | 82 | 8 | 0 | 1 | 901 | 15 | 6.37 | 3.55 | 1.79 | 0.82 | 16.3 | 9.1 | 1.43 | .302 | 4.42 | 105 | 4.09 | 103 | 9.27 | -3.3 |
| 10 | | R. Harden | 5.12 | 82.2 | 2011 | OAK | 15 | 4 | 4 | .500 | 15 | 91 | 0 | 0 | 0 | 87 | 47 | 48 | 17 | 31 | 2 | 0 | 0 | 363 | 4 | 9.91 | 3.38 | 2.94 | 1.85 | 25.1 | 8.5 | 1.43 | .315 | 5.23 | 129 | 4.69 | 118 | 9.47 | -6.9 |
More Athletics Stats
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HR
219
7th
R
733
12th
SO
1,323
20th
ERA
4.70
27th
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