| Team | Tm | Tier | Game |
|---|---|---|---|
| New York Mets | NYN | 4.67 | 199004220_WAS_NYN |
| Boston Red Sox | BOS | 3.02 | 199004240_ANA_BOS |
| Cincinnati Reds | CIN | 2.51 | 199004220_ATL_CIN |
| Kansas City Royals | KCA | 1.72 | 199004230_KCA_BAL |
| Oakland Athletics | OAK | 1.54 | 199004220_SEA_OAK |
| Team | Tm | Tier | Game |
|---|---|---|---|
| California Angels | ANA | -6.12 | 199004240_ANA_BOS |
| San Francisco Giants | SFN | -5.08 | 199004240_PIT_SFN |
| Atlanta Braves | ATL | -3.32 | 199004220_ATL_CIN |
| Baltimore Orioles | BAL | -0.77 | 199004240_OAK_BAL |
| Detroit Tigers | DET | -0.76 | 199004230_DET_MIN |
Based on accumulated WAA for this season up to 1990-04-24.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +010+ | 1.27 | Duane Ward | 14 | TOR |
| XXXXX | 1.07 | Paul Assenmacher | 14.3 | CHN |
| XXXXX | 0.91 | Terry Leach | 10 | MIN |
| XXXXX | 0.91 | Rob Dibble | 10.3 | CIN |
| XXXXX | 0.76 | Dan Petry | 13 | DET |
| XXXXX | 0.76 | Greg Harris | 13 | SDN |
| XXXXX | 0.74 | Ted Power | 8 | PIT |
| XXXXX | 0.74 | Mitch Williams | 8.3 | CHN |
| XXXXX | 0.74 | Gregg Olson | 8.3 | BAL |
| XXXXX | 0.74 | Mark Eichhorn | 13.3 | ANA |
| XXXXX | 0.72 | Tim Crews | 8 | LAN |
| XXXXX | 0.68 | Dave Smith | 7.7 | HOU |
| XXXXX | 0.66 | Gene Nelson | 7.7 | OAK |
| XXXXX | 0.65 | Brian Holman | 21 | SEA |
| XXXXX | 0.59 | Bill Landrum | 8.7 | PIT |
| XXXXX | 0.58 | Dave Wells | 8.7 | TOR |
| XXXXX | 0.58 | Barry Jones | 6.3 | CHA |
| XXXXX | 0.54 | Lee Smith | 8.3 | BOS |
| XXXXX | 0.54 | Ken Dayley | 6 | SLN |
| XXXXX | 0.53 | Larry Andersen | 8.3 | HOU |
| XXXXX | 0.52 | Dan Schatzeder | 10.7 | HOU |
| XXXXX | 0.51 | Dennis Eckersley | 6 | OAK |
| XXXXX | 0.5 | Eric Plunk | 5.3 | NYA |
| XXXXX | 0.49 | Bob Patterson | 5.3 | PIT |
| XXXXX | 0.49 | Julio Machado | 8 | NYN |
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