| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 4.22 | 199009010_TEX_OAK |
| Kansas City Royals | KCA | 1.68 | 199009010_KCA_SEA |
| Detroit Tigers | DET | 1.31 | 199009020_DET_MIN |
| Pittsburgh Pirates | PIT | 0.89 | 199009020_PIT_HOU |
| Los Angeles Dodgers | LAN | 0.8 | 199009010_LAN_WAS |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Atlanta Braves | ATL | -8.44 | 199009020_SLN_ATL |
| Boston Red Sox | BOS | -4.85 | 199009010_NYA_BOS |
| Chicago Cubs | CHN | -4.47 | 199009020_CIN_CHN |
| Minnesota Twins | MIN | -0.57 | 199009020_DET_MIN |
| New York Mets | NYN | -0.4 | 199008310_SFN_NYN |
Based on accumulated WAA for this season up to 1990-09-02.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +018+ | 4.62 | Bill Swift | 111.7 | SEA |
| +020+ | 4.53 | Jeff Brantley | 85 | SFN |
| +022+ | 4.41 | Steve Farr | 99 | KCA |
| +025+ | 4.28 | Dennis Eckersley | 59.3 | OAK |
| +039+ | 3.62 | Rob Dibble | 80.3 | CIN |
| +041+ | 3.55 | Edwin Nunez | 66.7 | DET |
| +044+ | 3.4 | Larry Andersen | 74.7 | TOT |
| +053+ | 3.08 | Randy Myers | 72 | CIN |
| +055+ | 2.99 | Tim Crews | 86.3 | LAN |
| +057+ | 2.98 | Lee Smith | 75 | TOT |
| +060+ | 2.95 | Bobby Thigpen | 72.7 | CHA |
| +062+ | 2.91 | Jeff Montgomery | 78 | KCA |
| +064+ | 2.86 | Tom Henke | 62.3 | TOR |
| +068+ | 2.73 | Greg Harris | 96.7 | SDN |
| +071+ | 2.57 | John Franco | 58.7 | NYN |
| +072+ | 2.55 | Gregg Olson | 63 | BAL |
| +080+ | 2.35 | Jay Howell | 56 | LAN |
| +081+ | 2.33 | Brad Arnsberg | 51.3 | TEX |
| +082+ | 2.32 | Barry Jones | 65.7 | CHA |
| +088+ | 2.25 | Dan Schatzeder | 62 | HOU |
| +090+ | 2.21 | Craig Lefferts | 72 | SDN |
| +092+ | 2.2 | Doug Jones | 65.3 | CLE |
| +094+ | 2.19 | Bryan Harvey | 55 | ANA |
| +096+ | 2.15 | Curt Schilling | 35.3 | BAL |
| +100+ | 2.11 | Terry Leach | 74 | MIN |
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