Not enough days in 1989 season to compile WAA record.
| Date | Rank | WAA | TeamID |
|---|---|---|---|
| 19890427 | XXXXX | 0.33 | CHN |
| 19890511 | XXXXX | 0.56 | CHN |
| 19890525 | XXXXX | 0.60 | CHN |
| 19890608 | XXXXX | 0.89 | CHN |
| 19890622 | XXXXX | 1.18 | CHN |
| 19890706 | +092+ | 1.61 | CHN |
| 19890723 | +075+ | 2.13 | CHN |
| 19890806 | +048+ | 2.99 | CHN |
| 19890820 | +064+ | 2.83 | CHN |
| 19890903 | +098+ | 2.39 | CHN |
| 19890917 | +131+ | 1.93 | CHN |
| 19891001 | XXXXX | 1.41 | CHN |
Mitch Williams Post Season Games
| Rank | WAA | IP | ERA | Gs | Gr | Tm |
|---|---|---|---|---|---|---|
| XXXXX | 0.08 | 1 | 0 | 0 | 2 | CHN |
| XXXXX | -0.8 | 8 | 7.88 | 0 | 7 | PHI |
| XXXXX | -0.72 | 9 | 7 | 0 | 0 | TOT |
_