Not enough days in 1931 season to compile WAA record.
The line graph below shows daily WAA and Batting Average for reference. Fluctuation in batting average decreases as a season progresses. BA for pitchers is batting average against.
| Date | Rank | WAA | TeamID |
|---|---|---|---|
| 19310510 | XXXXX | 0.47 | SLN |
| 19310524 | XXXXX | 0.97 | SLN |
| 19310607 | +033+ | 1.63 | SLN |
| 19310621 | +017+ | 3.02 | SLN |
| 19310705 | +013+ | 3.91 | SLN |
| 19310719 | +026+ | 3.43 | SLN |
| 19310802 | +032+ | 3.30 | SLN |
| 19310816 | +027+ | 3.79 | SLN |
| 19310830 | +019+ | 5.11 | SLN |
| 19310913 | +017+ | 6.02 | SLN |
| 19310927 | +033+ | 4.58 | SLN |
Bill Hallahan Post Season Games
| Rank | WAA | IP | ERA | Gs | Gr | Tm |
|---|---|---|---|---|---|---|
| +075+ | 2.07 | 39.7 | 1.36 | 5 | 2 | SLN |
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