| Rank | WAA | IP | ERA | Gs | Gr | Tm |
|---|---|---|---|---|---|---|
| +063+ | 1.98 | 108.0 | 4.00 | 13 | 7 | OAK |
| Date | Rank | WAA | TeamID |
|---|---|---|---|
| 19300518 | XXXXX | 0.13 | OAK |
| 19300601 | XXXXX | 1.03 | OAK |
| 19300615 | +059+ | 1.39 | OAK |
| 19300629 | +075+ | 1.33 | OAK |
| 19300713 | +061+ | 1.97 | OAK |
| 19300715 | +063+ | 1.98 | OAK |
| 19300720 | XXXXX | 0.95 | OAK |
| 19300803 | XXXXX | 0.06 | OAK |
| 19300817 | XXXXX | -0.95 | OAK |
| 19300831 | XXXXX | -0.94 | OAK |
| 19300914 | XXXXX | -0.50 | OAK |
| 19300928 | XXXXX | -0.78 | 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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