| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 6.2 | 199009180_CHA_OAK |
| Detroit Tigers | DET | 2.2 | 199009190_DET_ANA |
| Los Angeles Dodgers | LAN | 1.5 | 199009180_LAN_ATL |
| Pittsburgh Pirates | PIT | 1.07 | 199009190_PIT_CHN |
| Cincinnati Reds | CIN | 1.03 | 199009190_CIN_HOU |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Atlanta Braves | ATL | -6.44 | 199009170_LAN_ATL |
| Chicago Cubs | CHN | -2.52 | 199009180_PIT_CHN |
| Houston Astros | HOU | -1.76 | 199009190_CIN_HOU |
| Minnesota Twins | MIN | -1.57 | 199009170_KCA_MIN |
| New York Yankees | NYA | -0.95 | 199009170_NYA_TOR |
Based on accumulated WAA for this season up to 1990-09-19.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +021+ | 5.04 | Dennis Eckersley | 68 | OAK |
| +023+ | 4.99 | Bill Swift | 122.7 | SEA |
| +027+ | 4.62 | Steve Farr | 112.7 | KCA |
| +030+ | 4.56 | Larry Andersen | 87.7 | TOT |
| +036+ | 4.19 | Rob Dibble | 91.3 | CIN |
| +047+ | 3.76 | Edwin Nunez | 78 | DET |
| +049+ | 3.56 | Randy Myers | 79.7 | CIN |
| +050+ | 3.53 | Greg Harris | 110.7 | SDN |
| +053+ | 3.49 | Bobby Thigpen | 80.7 | CHA |
| +059+ | 3.3 | Jeff Montgomery | 89 | KCA |
| +060+ | 3.27 | Gene Nelson | 69.3 | OAK |
| +064+ | 3.08 | Lee Smith | 80.7 | TOT |
| +065+ | 3.08 | Tom Henke | 69.3 | TOR |
| +067+ | 2.95 | Brad Arnsberg | 58.3 | TEX |
| +078+ | 2.59 | Jay Howell | 61 | LAN |
| +082+ | 2.52 | Gregg Olson | 69.7 | BAL |
| +084+ | 2.49 | Doug Jones | 77.3 | CLE |
| +087+ | 2.45 | Dan Schatzeder | 66.7 | TOT |
| +096+ | 2.37 | Craig Lefferts | 76.3 | SDN |
| +098+ | 2.32 | Barry Jones | 70 | CHA |
| +100+ | 2.26 | John Franco | 64.3 | NYN |
| +107+ | 2.1 | Paul Gibson | 96.7 | DET |
| +109+ | 2.09 | Bill Landrum | 65 | PIT |
| +110+ | 2.04 | Eric Plunk | 69 | NYA |
| +113+ | 1.97 | Mike Henneman | 90.7 | DET |
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