Not enough days in 1999 season to compile WAA record.
| Date | Rank | WAA | TeamID |
|---|---|---|---|
| 19990416 | XXXXX | 0.05 | PIT |
| 19990430 | XXXXX | 0.63 | PIT |
| 19990514 | +080+ | 1.27 | PIT |
| 19990528 | +059+ | 1.78 | PIT |
| 19990611 | +133+ | 1.30 | PIT |
| 19990625 | +108+ | 1.82 | PIT |
| 19990709 | +130+ | 1.83 | PIT |
| 19990726 | +114+ | 2.29 | PIT |
| 19990809 | +108+ | 2.55 | PIT |
| 19990823 | +130+ | 2.29 | PIT |
| 19990906 | XXXXX | 1.05 | PIT |
| 19990920 | XXXXX | 0.99 | PIT |
| 19991004 | XXXXX | -0.33 | PIT |
Mike Williams Post Season Games
| Rank | WAA | IP | ERA | Gs | Gr | Tm |
|---|---|---|---|---|---|---|
| XXXXX | -0.13 | 1 | 9 | 0 | 1 | HOU |
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