Not enough days in 1999 season to compile WAA record.
| Date | Rank | WAA | TeamID |
|---|---|---|---|
| 19990416 | XXXXX | -0.01 | NYA |
| 19990430 | XXXXX | -0.50 | NYA |
| 19990514 | XXXXX | -0.22 | NYA |
| 19990528 | XXXXX | 0.62 | NYA |
| 19990611 | XXXXX | 0.89 | NYA |
| 19990625 | +067+ | 2.27 | NYA |
| 19990709 | +097+ | 2.23 | NYA |
| 19990726 | +080+ | 2.71 | NYA |
| 19990809 | +044+ | 4.11 | NYA |
| 19990823 | +033+ | 5.10 | NYA |
| 19990906 | +038+ | 5.16 | NYA |
| 19990920 | +035+ | 5.65 | NYA |
| 19991004 | +036+ | 5.95 | NYA |
Bernie Williams Post Season Games
| Rank | WAA | BA | OBP | PA | Rbis | Runs | Tm |
|---|---|---|---|---|---|---|---|
| +003+ | 5.25 | 0.275 | 0.371 | 545 | 80 | 83 | NYA |
_