| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 4.06 | 199009150_MIN_OAK |
| Detroit Tigers | DET | 2.35 | 199009150_NYA_DET |
| Los Angeles Dodgers | LAN | 1.56 | 199009160_LAN_CIN |
| Pittsburgh Pirates | PIT | 1.43 | 199009140_PIT_WAS |
| St. Louis Cardinals | SLN | 0.81 | 199009140_CHN_SLN |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Chicago Cubs | CHN | -7.57 | 199009140_CHN_SLN |
| Atlanta Braves | ATL | -7.5 | 199009160_SDN_ATL |
| Minnesota Twins | MIN | -2.23 | 199009150_MIN_OAK |
| New York Yankees | NYA | -1.25 | 199009140_NYA_DET |
| Houston Astros | HOU | -1.07 | 199009160_SFN_HOU |
Based on accumulated WAA for this season up to 1990-09-16.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +021+ | 5.2 | John Tudor | 146.3 | SLN |
| +022+ | 4.89 | Dennis Eckersley | 66.3 | OAK |
| +023+ | 4.85 | Bill Swift | 121.3 | SEA |
| +031+ | 4.36 | Larry Andersen | 85.7 | TOT |
| +035+ | 4.05 | Rob Dibble | 90 | CIN |
| +038+ | 3.98 | Steve Farr | 105.7 | KCA |
| +044+ | 3.75 | Edwin Nunez | 78 | DET |
| +048+ | 3.55 | Randy Myers | 79.7 | CIN |
| +052+ | 3.48 | Bobby Thigpen | 80.7 | CHA |
| +053+ | 3.26 | Jeff Montgomery | 86.3 | KCA |
| +057+ | 3.16 | Greg Harris | 106.7 | SDN |
| +059+ | 3.11 | Tim Crews | 92.3 | LAN |
| +060+ | 3.09 | Gene Nelson | 67.3 | OAK |
| +062+ | 2.98 | Lee Smith | 79.7 | TOT |
| +066+ | 2.89 | Tom Henke | 67.3 | TOR |
| +069+ | 2.82 | Brad Arnsberg | 57 | TEX |
| +076+ | 2.61 | Jay Howell | 59 | LAN |
| +084+ | 2.44 | Dan Schatzeder | 66.7 | TOT |
| +086+ | 2.43 | Gregg Olson | 68.7 | BAL |
| +094+ | 2.37 | John Franco | 63.3 | NYN |
| +097+ | 2.31 | Barry Jones | 70 | CHA |
| +099+ | 2.29 | Dave Smith | 58 | HOU |
| +100+ | 2.27 | Craig Lefferts | 75.3 | SDN |
| +108+ | 2.09 | Scott Ruskin | 67.7 | TOT |
| +109+ | 2.08 | Bill Landrum | 65 | PIT |
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