| Team | Tm | Tier | Game |
|---|---|---|---|
| New York Mets | NYN | 5.39 | 199004280_NYN_HOU |
| Houston Astros | HOU | 2.79 | 199004300_HOU_WAS |
| Oakland Athletics | OAK | 2.26 | 199004280_OAK_BOS |
| Cincinnati Reds | CIN | 1.75 | 199004290_WAS_CIN |
| Boston Red Sox | BOS | 0.99 | 199004280_OAK_BOS |
| Team | Tm | Tier | Game |
|---|---|---|---|
| California Angels | ANA | -4.73 | 199004280_ANA_NYA |
| San Francisco Giants | SFN | -4.69 | 199004280_SLN_SFN |
| Atlanta Braves | ATL | -1.68 | 199004280_PHI_ATL |
| Detroit Tigers | DET | -1.45 | 199004300_MIL_DET |
| St. Louis Cardinals | SLN | -1.34 | 199004290_SLN_SFN |
Based on accumulated WAA for this season up to 1990-04-30.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +024+ | 1.27 | Paul Assenmacher | 16.7 | CHN |
| XXXXX | 1.19 | Rob Dibble | 13.7 | CIN |
| XXXXX | 1.12 | Terry Leach | 12.3 | MIN |
| XXXXX | 1.08 | Mark Eichhorn | 17.3 | ANA |
| XXXXX | 1.08 | Duane Ward | 16.7 | TOR |
| XXXXX | 1.07 | Mitch Williams | 12 | CHN |
| XXXXX | 1.05 | Gregg Olson | 12.3 | BAL |
| XXXXX | 0.94 | Ted Power | 10.7 | PIT |
| XXXXX | 0.91 | Greg Harris | 15 | SDN |
| XXXXX | 0.86 | Dave Smith | 12.3 | HOU |
| XXXXX | 0.84 | Dennis Eckersley | 10 | OAK |
| XXXXX | 0.8 | Doug Jones | 8.7 | CLE |
| XXXXX | 0.74 | Larry Andersen | 11 | HOU |
| XXXXX | 0.74 | Juan Agosto | 11 | HOU |
| XXXXX | 0.73 | Jeff Reardon | 8.3 | BOS |
| XXXXX | 0.73 | Bob Patterson | 10.7 | PIT |
| XXXXX | 0.71 | Ken Dayley | 8 | SLN |
| XXXXX | 0.7 | Bill Landrum | 10.3 | PIT |
| XXXXX | 0.69 | Barry Jones | 10.3 | CHA |
| XXXXX | 0.68 | Mike Henneman | 12.3 | DET |
| XXXXX | 0.66 | Wayne Edwards | 10 | CHA |
| XXXXX | 0.66 | Dave Wells | 9.7 | TOR |
| XXXXX | 0.65 | Bill Sampen | 7.3 | WAS |
| XXXXX | 0.62 | Mark Williamson | 7.3 | BAL |
| XXXXX | 0.59 | Dan Schatzeder | 11.7 | HOU |
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