| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 6.08 | 199009100_OAK_SEA |
| Chicago White Sox | CHA | 1.86 | 199009090_CHA_TOR |
| Pittsburgh Pirates | PIT | 1.44 | 199009090_WAS_PIT |
| St. Louis Cardinals | SLN | 1.39 | 199009100_SLN_NYN |
| Los Angeles Dodgers | LAN | 1.04 | 199009100_LAN_SDN |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Atlanta Braves | ATL | -4.52 | 199009080_ATL_SDN |
| Chicago Cubs | CHN | -4.42 | 199009100_WAS_CHN |
| Baltimore Orioles | BAL | -1.6 | 199009080_ANA_BAL |
| Boston Red Sox | BOS | -1.43 | 199009090_SEA_BOS |
| Houston Astros | HOU | -1.04 | 199009080_HOU_SFN |
Based on accumulated WAA for this season up to 1990-09-10.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +018+ | 5.13 | Bill Swift | 117.7 | SEA |
| +020+ | 4.99 | John Tudor | 144.3 | SLN |
| +025+ | 4.59 | Dennis Eckersley | 63 | OAK |
| +036+ | 3.98 | Larry Andersen | 81.3 | TOT |
| +038+ | 3.95 | Edwin Nunez | 73.3 | DET |
| +042+ | 3.8 | Rob Dibble | 84.7 | CIN |
| +043+ | 3.79 | Steve Farr | 103.7 | KCA |
| +046+ | 3.48 | Gene Nelson | 64.7 | OAK |
| +048+ | 3.4 | Bobby Thigpen | 77.7 | CHA |
| +053+ | 3.26 | Lee Smith | 78.3 | TOT |
| +055+ | 3.21 | Randy Myers | 75.7 | CIN |
| +057+ | 3.12 | Tom Henke | 65.3 | TOR |
| +058+ | 3.1 | Greg Harris | 103.7 | SDN |
| +060+ | 3.06 | Tim Crews | 92 | LAN |
| +064+ | 2.86 | Jeff Montgomery | 82 | KCA |
| +069+ | 2.71 | Gregg Olson | 65 | BAL |
| +071+ | 2.7 | Brad Arnsberg | 55.7 | TEX |
| +080+ | 2.49 | John Franco | 60 | NYN |
| +087+ | 2.42 | Jay Howell | 57 | LAN |
| +092+ | 2.33 | Craig Lefferts | 73.7 | SDN |
| +095+ | 2.26 | Barry Jones | 67.3 | CHA |
| +097+ | 2.24 | Bryan Harvey | 58 | ANA |
| +100+ | 2.21 | Dan Schatzeder | 64 | HOU |
| +102+ | 2.11 | Dave Smith | 56 | HOU |
| +110+ | 2.02 | Bill Landrum | 64.7 | PIT |
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