| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 5.98 | 199010010_ANA_OAK |
| Cincinnati Reds | CIN | 3.19 | 199010020_HOU_CIN |
| Pittsburgh Pirates | PIT | 2.33 | 199010010_NYN_PIT |
| Chicago White Sox | CHA | 2.1 | 199010010_CHA_BOS |
| New York Mets | NYN | 1.65 | 199010020_NYN_PIT |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Atlanta Braves | ATL | -8.37 | 199010030_ATL_SFN |
| Houston Astros | HOU | -1.84 | 199010010_HOU_CIN |
| Philadelphia Phillies | PHI | -1.53 | 199010020_CHN_PHI |
| San Francisco Giants | SFN | -1.35 | 199010030_ATL_SFN |
| Boston Red Sox | BOS | -1.28 | 199010010_CHA_BOS |
Based on accumulated WAA for this season up to 1990-10-03.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +024+ | 5.49 | Dennis Eckersley | 73.3 | OAK |
| +030+ | 5.01 | Bill Swift | 128 | SEA |
| +035+ | 4.75 | Rob Dibble | 98 | CIN |
| +039+ | 4.38 | Larry Andersen | 95.7 | TOT |
| +043+ | 4.17 | Bobby Thigpen | 88.7 | CHA |
| +044+ | 4.13 | Greg Harris | 117.3 | SDN |
| +047+ | 3.89 | Norm Charlton | 154.3 | CIN |
| +051+ | 3.72 | Gene Nelson | 74.7 | OAK |
| +054+ | 3.53 | Randy Myers | 86.7 | CIN |
| +062+ | 3.32 | Jeff Montgomery | 94.3 | KCA |
| +063+ | 3.27 | Lee Smith | 83 | TOT |
| +064+ | 3.16 | Tim Crews | 107.3 | LAN |
| +066+ | 3.09 | Edwin Nunez | 80.3 | DET |
| +075+ | 2.89 | Tom Henke | 74.7 | TOR |
| +077+ | 2.84 | Doug Jones | 84.3 | CLE |
| +083+ | 2.67 | Dan Schatzeder | 69.7 | TOT |
| +085+ | 2.65 | Bill Landrum | 71.7 | PIT |
| +087+ | 2.58 | Jay Howell | 66 | LAN |
| +088+ | 2.55 | Paul Assenmacher | 103 | CHN |
| +091+ | 2.48 | Gregg Olson | 74.3 | BAL |
| +092+ | 2.48 | Brad Arnsberg | 62.7 | TEX |
| +096+ | 2.43 | Barry Jones | 74 | CHA |
| +099+ | 2.37 | Craig Lefferts | 78.7 | SDN |
| +105+ | 2.2 | Tim Burke | 75 | WAS |
| +108+ | 2.18 | Steve Frey | 55.7 | WAS |
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