Not enough days in 1921 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 |
|---|---|---|---|
| 19210515 | +012+ | 1.97 | PIT |
| 19210529 | +019+ | 2.25 | PIT |
| 19210612 | +031+ | 1.99 | PIT |
| 19210626 | +019+ | 3.21 | PIT |
| 19210710 | +020+ | 3.62 | PIT |
| 19210724 | +024+ | 3.57 | PIT |
| 19210807 | +020+ | 4.10 | PIT |
| 19210821 | +030+ | 3.38 | PIT |
| 19210904 | +033+ | 3.64 | PIT |
| 19210918 | +027+ | 4.47 | PIT |
| 19211002 | +025+ | 5.06 | PIT |
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