Not enough days in 1927 season to compile WAA record.
| Date | Rank | WAA | TeamID |
|---|---|---|---|
| 19270515 | XXXXX | -0.84 | PIT |
| 19270529 | XXXXX | -0.82 | PIT |
| 19270612 | XXXXX | -0.79 | PIT |
| 19270626 | XXXXX | -0.80 | PIT |
| 19270710 | XXXXX | -0.77 | PIT |
| 19270724 | XXXXX | -0.76 | PIT |
| 19270807 | XXXXX | -0.78 | PIT |
| 19270821 | XXXXX | -0.79 | PIT |
| 19270904 | XXXXX | -0.81 | PIT |
| 19270918 | XXXXX | -0.81 | PIT |
| 19271002 | XXXXX | -0.81 | PIT |
Roy Mahaffey Post Season Games
| Rank | WAA | IP | ERA | Gs | Gr | Tm |
|---|---|---|---|---|---|---|
| XXXXX | -0.13 | 1 | 9 | 0 | 1 | OAK |
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