| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 4.52 | 199009170_CHA_OAK |
| Detroit Tigers | DET | 2.35 | 199009150_NYA_DET |
| Los Angeles Dodgers | LAN | 1.56 | 199009160_LAN_CIN |
| Pittsburgh Pirates | PIT | 1.25 | 199009150_PIT_WAS |
| St. Louis Cardinals | SLN | 0.81 | 199009150_CHN_SLN |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Atlanta Braves | ATL | -7.5 | 199009160_SDN_ATL |
| Chicago Cubs | CHN | -6.72 | 199009150_CHN_SLN |
| Minnesota Twins | MIN | -2.23 | 199009150_MIN_OAK |
| New York Yankees | NYA | -1.15 | 199009150_NYA_DET |
| Houston Astros | HOU | -1.07 | 199009160_SFN_HOU |
Based on accumulated WAA for this season up to 1990-09-17.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +022+ | 4.88 | Dennis Eckersley | 66.3 | OAK |
| +023+ | 4.84 | Bill Swift | 121.3 | SEA |
| +027+ | 4.61 | Steve Farr | 112.7 | KCA |
| +028+ | 4.54 | Larry Andersen | 87.7 | TOT |
| +036+ | 4.05 | Rob Dibble | 90 | CIN |
| +045+ | 3.75 | Edwin Nunez | 78 | DET |
| +049+ | 3.54 | Randy Myers | 79.7 | CIN |
| +051+ | 3.47 | Bobby Thigpen | 80.7 | CHA |
| +054+ | 3.38 | Tim Crews | 97.7 | LAN |
| +055+ | 3.35 | Jeff Montgomery | 87.3 | KCA |
| +058+ | 3.15 | Greg Harris | 106.7 | SDN |
| +060+ | 3.08 | Gene Nelson | 67.3 | OAK |
| +065+ | 2.98 | Tom Henke | 68.3 | TOR |
| +066+ | 2.98 | Lee Smith | 79.7 | TOT |
| +071+ | 2.82 | Brad Arnsberg | 57 | TEX |
| +078+ | 2.58 | Jay Howell | 61 | LAN |
| +086+ | 2.43 | Dan Schatzeder | 66.7 | TOT |
| +089+ | 2.42 | Gregg Olson | 68.7 | BAL |
| +093+ | 2.37 | John Franco | 63.3 | NYN |
| +096+ | 2.3 | Barry Jones | 70 | CHA |
| +097+ | 2.28 | Dave Smith | 58 | HOU |
| +099+ | 2.27 | Craig Lefferts | 75.3 | SDN |
| +102+ | 2.23 | Doug Jones | 74.7 | CLE |
| +109+ | 2.08 | Scott Ruskin | 67.7 | TOT |
| +110+ | 2.08 | Bill Landrum | 65 | PIT |
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