4 pitchers were tied for starting the most games for the Oakland Athletics in 2020, with 11 starts. The first three are Chris Bassitt, Mike Fiers and Sean Manaea.
| NAME | GS | SEASON | TM | G | W | L | W% | ERA | 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 |  | C. Bassitt | 11 | 2020 |  OAK | 11 | 5 | 2 | .714 | 2.29 | 55 | 0 | 0 | 0 | 63.0 | 56 | 16 | 18 | 6 | 17 | 2 | 0 | 0 | 261 | 2 | 7.86 | 2.43 | 3.24 | 0.86 | 21.1 | 6.5 | 1.16 | .276 | 2.57 | 54 | 3.58 | 83 | 8.00 | 5.2 |
| 2 |  | M. Fiers | 11 | 2020 | OAK | 11 | 6 | 3 | .667 | 4.58 | 37 | 0 | 0 | 0 | 59.0 | 65 | 30 | 31 | 9 | 16 | 4 | 0 | 0 | 257 | 1 | 5.64 | 2.44 | 2.31 | 1.37 | 14.4 | 6.2 | 1.37 | .293 | 4.73 | 109 | 4.93 | 114 | 9.92 | -4.3 |
| 3 |  | S. Manaea | 11 | 2020 | OAK | 11 | 4 | 3 | .571 | 4.50 | 45 | 0 | 0 | 0 | 54.0 | 57 | 27 | 32 | 7 | 8 | 1 | 0 | 0 | 222 | 1 | 7.50 | 1.33 | 5.63 | 1.17 | 20.3 | 3.6 | 1.20 | .311 | 5.33 | 107 | 3.70 | 86 | 9.50 | 3.7 |
| 4 | | F. Montas | 11 | 2020 | OAK | 11 | 3 | 5 | .375 | 5.60 | 60 | 0 | 0 | 0 | 53.0 | 57 | 33 | 35 | 10 | 23 | 1 | 0 | 0 | 237 | 2 | 10.19 | 3.91 | 2.61 | 1.70 | 25.3 | 9.7 | 1.51 | .329 | 5.94 | 133 | 4.73 | 110 | 9.68 | -2.6 |
| 5 | | J. Luzardo | 9 | 2020 | OAK | 12 | 3 | 2 | .600 | 4.12 | 59 | 0 | 0 | 0 | 59.0 | 58 | 27 | 27 | 9 | 17 | 3 | 1 | 1 | 248 | 3 | 9.00 | 2.59 | 3.47 | 1.37 | 23.8 | 6.9 | 1.27 | .306 | 4.12 | 98 | 4.18 | 97 | 8.85 | 0.8 |
| 6 | | M. Minor | 4 | 2020 | OAK | 5 | 1 | 1 | .500 | 5.48 | 27 | 1 | 1 | 0 | 21.1 | 15 | 13 | 13 | 4 | 7 | 1 | 0 | 0 | 84 | 0 | 11.39 | 2.95 | 3.86 | 1.69 | 32.1 | 8.3 | 1.03 | .244 | 5.48 | 131 | 4.21 | 98 | 6.33 | 0.2 |
| 7 | | P. Blackburn | 1 | 2020 | OAK | 1 | 0 | 1 | .000 | 27.00 | 2 | 0 | 0 | 0 | 2.1 | 5 | 7 | 7 | 0 | 2 | 0 | 0 | 0 | 14 | 1 | 7.71 | 7.71 | 1.00 | 0.00 | 14.3 | 14.3 | 3.00 | .500 | 27.00 | 643 | 4.04 | 94 | 19.29 | 0.1 |
| 8 | | D. Jefferies | 1 | 2020 | OAK | 1 | 0 | 1 | .000 | 22.50 | 1 | 0 | 0 | 0 | 2.0 | 5 | 5 | 5 | 2 | 2 | 0 | 0 | 0 | 13 | 0 | 4.50 | 9.00 | 0.50 | 9.00 | 7.7 | 15.4 | 3.50 | .375 | 22.50 | 535 | 18.18 | 422 | 22.50 | -3.2 |
| 9 | | D. Mengden | 1 | 2020 | OAK | 4 | 0 | 1 | .000 | 3.65 | 10 | 0 | 0 | 0 | 12.1 | 14 | 5 | 5 | 2 | 7 | 1 | 2 | 0 | 58 | 0 | 7.30 | 5.11 | 1.43 | 1.46 | 17.2 | 12.1 | 1.70 | .316 | 3.65 | 87 | 5.61 | 130 | 10.22 | -1.9 |
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