| 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 |
|---|---|---|---|
| Chicago Cubs | CHN | -11.9 | 199009110_WAS_CHN |
| Atlanta Braves | ATL | -3.91 | 199009090_ATL_SDN |
| Baltimore Orioles | BAL | -1.57 | 199009090_ANA_BAL |
| Boston Red Sox | BOS | -1.43 | 199009090_SEA_BOS |
| Houston Astros | HOU | -1.04 | 199009090_HOU_SFN |
Based on accumulated WAA for this season up to 1990-09-11.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +019+ | 5.13 | Bill Swift | 117.7 | SEA |
| +020+ | 5 | John Tudor | 144.3 | SLN |
| +024+ | 4.59 | Dennis Eckersley | 63 | OAK |
| +035+ | 4.07 | Larry Andersen | 82.3 | TOT |
| +037+ | 3.95 | Edwin Nunez | 73.3 | DET |
| +041+ | 3.88 | Steve Farr | 104.7 | KCA |
| +042+ | 3.83 | Rob Dibble | 85 | CIN |
| +048+ | 3.4 | Bobby Thigpen | 77.7 | CHA |
| +050+ | 3.35 | Randy Myers | 77.3 | CIN |
| +052+ | 3.33 | Gene Nelson | 65.3 | OAK |
| +058+ | 3.12 | Tom Henke | 65.3 | TOR |
| +059+ | 3.1 | Greg Harris | 103.7 | SDN |
| +061+ | 3.07 | Tim Crews | 92 | LAN |
| +063+ | 2.95 | Jeff Montgomery | 83 | KCA |
| +065+ | 2.88 | Lee Smith | 78.7 | TOT |
| +069+ | 2.77 | Gregg Olson | 65.7 | BAL |
| +070+ | 2.7 | Brad Arnsberg | 55.7 | TEX |
| +082+ | 2.43 | Jay Howell | 57 | LAN |
| +089+ | 2.33 | Craig Lefferts | 73.7 | SDN |
| +092+ | 2.24 | Bryan Harvey | 58 | ANA |
| +097+ | 2.21 | Dan Schatzeder | 64 | HOU |
| +101+ | 2.16 | John Franco | 61 | NYN |
| +102+ | 2.12 | Dave Smith | 56 | HOU |
| +103+ | 2.12 | Barry Jones | 68 | CHA |
| +112+ | 2.02 | Bill Landrum | 64.7 | PIT |
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