Not enough days in 1989 season to compile WAA record.
| Date | Rank | WAA | TeamID |
|---|---|---|---|
| 19890427 | +014+ | 1.44 | TEX |
| 19890511 | +032+ | 1.59 | TEX |
| 19890525 | +026+ | 1.98 | TEX |
| 19890608 | +007+ | 3.24 | TEX |
| 19890622 | +002+ | 4.50 | TEX |
| 19890706 | +006+ | 4.45 | TEX |
| 19890723 | +008+ | 4.73 | TEX |
| 19890806 | +003+ | 5.62 | TEX |
| 19890820 | +007+ | 5.83 | TEX |
| 19890903 | +002+ | 7.04 | TEX |
| 19890917 | +004+ | 7.41 | TEX |
| 19891001 | +003+ | 7.94 | TEX |
Ruben Sierra Post Season Games
| Rank | WAA | BA | OBP | PA | Rbis | Runs | Tm |
|---|---|---|---|---|---|---|---|
| XXXXX | 0.55 | 0.333 | 0.357 | 28 | 7 | 4 | OAK |
| XXXXX | 0.32 | 0.239 | 0.325 | 77 | 14 | 5 | NYA |
| XXXXX | 0.86 | 0.264 | 0.333 | 105 | 21 | 9 | TOT |
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