| 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 | 1.06 | 199009200_CIN_HOU |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Atlanta Braves | ATL | -6.44 | 199009180_LAN_ATL |
| Chicago Cubs | CHN | -3.62 | 199009200_PIT_CHN |
| Houston Astros | HOU | -1.79 | 199009200_CIN_HOU |
| Minnesota Twins | MIN | -1.46 | 199009180_KCA_MIN |
| New York Yankees | NYA | -0.95 | 199009180_NYA_TOR |
Based on accumulated WAA for this season up to 1990-09-20.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +021+ | 5.05 | Dennis Eckersley | 68 | OAK |
| +024+ | 4.99 | Bill Swift | 122.7 | SEA |
| +028+ | 4.63 | Steve Farr | 112.7 | KCA |
| +032+ | 4.56 | Larry Andersen | 87.7 | TOT |
| +037+ | 4.2 | Rob Dibble | 91.3 | CIN |
| +046+ | 3.76 | Edwin Nunez | 78 | DET |
| +048+ | 3.54 | Greg Harris | 110.7 | SDN |
| +049+ | 3.5 | Bobby Thigpen | 80.7 | CHA |
| +056+ | 3.31 | Jeff Montgomery | 89 | KCA |
| +058+ | 3.28 | Gene Nelson | 69.3 | OAK |
| +059+ | 3.27 | Randy Myers | 81 | CIN |
| +063+ | 3.09 | Lee Smith | 80.7 | TOT |
| +064+ | 3.08 | Tom Henke | 69.3 | TOR |
| +067+ | 2.96 | Brad Arnsberg | 58.3 | TEX |
| +080+ | 2.59 | Jay Howell | 61 | LAN |
| +082+ | 2.53 | Gregg Olson | 69.7 | BAL |
| +084+ | 2.49 | Doug Jones | 77.3 | CLE |
| +085+ | 2.48 | Dan Schatzeder | 67 | TOT |
| +091+ | 2.38 | Craig Lefferts | 76.3 | SDN |
| +096+ | 2.33 | Barry Jones | 70 | CHA |
| +097+ | 2.32 | John Franco | 65 | NYN |
| +107+ | 2.11 | Paul Gibson | 96.7 | DET |
| +108+ | 2.1 | Bill Landrum | 65 | PIT |
| +110+ | 2.05 | Eric Plunk | 69 | NYA |
| +114+ | 1.98 | Mike Henneman | 90.7 | DET |
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