| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 2.68 | 199008280_KCA_OAK |
| Kansas City Royals | KCA | 1.52 | 199008280_KCA_OAK |
| Cincinnati Reds | CIN | 1.51 | 199008280_SLN_CIN |
| Montreal Expos | WAS | 0.78 | 199008270_SDN_WAS |
| Pittsburgh Pirates | PIT | 0.78 | 199008280_PIT_ATL |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Atlanta Braves | ATL | -12.66 | 199008290_PIT_ATL |
| Boston Red Sox | BOS | -4.17 | 199008290_BOS_CLE |
| Philadelphia Phillies | PHI | -1.24 | 199008290_LAN_PHI |
| San Diego Padres | SDN | -1.11 | 199008280_SDN_NYN |
| Minnesota Twins | MIN | -0.32 | 199008270_CHA_MIN |
Based on accumulated WAA for this season up to 1990-08-29.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +015+ | 4.62 | Jeff Brantley | 84 | SFN |
| +021+ | 4.29 | Bill Swift | 108 | SEA |
| +022+ | 4.27 | Steve Farr | 95.3 | KCA |
| +025+ | 4.13 | Dennis Eckersley | 55.3 | OAK |
| +036+ | 3.58 | Doug Jones | 64.3 | CLE |
| +038+ | 3.55 | Randy Myers | 70.3 | CIN |
| +043+ | 3.37 | Rob Dibble | 77.7 | CIN |
| +044+ | 3.33 | Edwin Nunez | 64.3 | DET |
| +046+ | 3.32 | Gene Nelson | 62.7 | OAK |
| +047+ | 3.31 | Larry Andersen | 73.7 | HOU |
| +052+ | 2.95 | Lee Smith | 74.7 | TOT |
| +058+ | 2.9 | Jeff Montgomery | 78 | KCA |
| +059+ | 2.77 | Tom Henke | 61.3 | TOR |
| +060+ | 2.77 | Tim Crews | 84 | LAN |
| +063+ | 2.69 | Greg Harris | 94 | SDN |
| +064+ | 2.68 | Bobby Thigpen | 69.7 | CHA |
| +069+ | 2.63 | John Franco | 57 | NYN |
| +072+ | 2.54 | Gregg Olson | 63 | BAL |
| +080+ | 2.41 | Barry Jones | 64.3 | CHA |
| +082+ | 2.29 | Brad Arnsberg | 51 | TEX |
| +085+ | 2.25 | Jay Howell | 55 | LAN |
| +091+ | 2.12 | Mike Schooler | 56 | SEA |
| +092+ | 2.11 | Craig Lefferts | 71 | SDN |
| +094+ | 2.08 | Dan Schatzeder | 60 | HOU |
| +095+ | 2.05 | Curt Schilling | 34.3 | BAL |
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