| Rank | WAA | IP | ERA | Gs | Gr | Tm |
|---|---|---|---|---|---|---|
| +079+ | 1.57 | 128.7 | 3.64 | 16 | 7 | OAK |
| Date | Rank | WAA | TeamID |
|---|---|---|---|
| 19310518 | XXXXX | -0.72 | OAK |
| 19310601 | XXXXX | -1.04 | OAK |
| 19310615 | XXXXX | -0.23 | OAK |
| 19310629 | XXXXX | 0.31 | OAK |
| 19310713 | -062- | -1.26 | OAK |
| 19310727 | XXXXX | 0.73 | OAK |
| 19310810 | +076+ | 1.68 | OAK |
| 19310816 | +079+ | 1.57 | OAK |
| 19310830 | +083+ | 1.74 | OAK |
| 19310913 | XXXXX | -0.32 | OAK |
| 19310927 | XXXXX | -0.49 | OAK |
Roy Mahaffey Post Season Games
| Rank | WAA | IP | ERA | Gs | Gr | Tm |
|---|---|---|---|---|---|---|
| XXXXX | -0.13 | 1 | 9 | 0 | 1 | OAK |
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