Not enough days in 1998 season to compile WAA record.
| Date | Rank | WAA | TeamID |
|---|---|---|---|
| 19980409 | XXXXX | 0.56 | BAL |
| 19980423 | XXXXX | 0.92 | BAL |
| 19980507 | +035+ | 1.72 | BAL |
| 19980521 | +028+ | 2.34 | BAL |
| 19980604 | +049+ | 2.37 | BAL |
| 19980618 | XXXXX | 0.83 | BAL |
| 19980703 | +122+ | 1.77 | BAL |
| 19980720 | +111+ | 2.17 | BAL |
| 19980803 | +107+ | 2.55 | BAL |
| 19980817 | +070+ | 3.53 | BAL |
| 19980831 | +069+ | 3.84 | BAL |
| 19980914 | +051+ | 5.10 | BAL |
| 19980928 | +068+ | 4.73 | BAL |
Mike Mussina Post Season Games
| Rank | WAA | IP | ERA | Gs | Gr | Tm |
|---|---|---|---|---|---|---|
| XXXXX | 1.06 | 42.7 | 2.53 | 6 | 0 | BAL |
| XXXXX | -0.48 | 97 | 3.8 | 15 | 2 | NYA |
| XXXXX | 0.58 | 139.7 | 3.42 | 0 | 0 | TOT |
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