| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 4.56 | 199009090_OAK_NYA |
| Chicago White Sox | CHA | 1.86 | 199009090_CHA_TOR |
| Pittsburgh Pirates | PIT | 1.44 | 199009090_WAS_PIT |
| St. Louis Cardinals | SLN | 1.37 | 199009080_SLN_CHN |
| Los Angeles Dodgers | LAN | 1.02 | 199009080_CIN_LAN |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Atlanta Braves | ATL | -4.52 | 199009080_ATL_SDN |
| Chicago Cubs | CHN | -3.72 | 199009090_SLN_CHN |
| Boston Red Sox | BOS | -1.65 | 199009070_SEA_BOS |
| Baltimore Orioles | BAL | -1.61 | 199009070_ANA_BAL |
| Houston Astros | HOU | -1.08 | 199009070_HOU_SFN |
Based on accumulated WAA for this season up to 1990-09-09.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +017+ | 5.14 | Bill Swift | 117.7 | SEA |
| +018+ | 4.99 | John Tudor | 144.3 | SLN |
| +023+ | 4.65 | Jeff Brantley | 86.7 | SFN |
| +024+ | 4.6 | Dennis Eckersley | 63 | OAK |
| +036+ | 3.99 | Larry Andersen | 81.3 | TOT |
| +038+ | 3.96 | Edwin Nunez | 73.3 | DET |
| +040+ | 3.81 | Rob Dibble | 84.7 | CIN |
| +041+ | 3.8 | Steve Farr | 103.7 | KCA |
| +047+ | 3.48 | Gene Nelson | 64.7 | OAK |
| +049+ | 3.4 | Tim Crews | 91 | LAN |
| +051+ | 3.27 | Lee Smith | 78.3 | TOT |
| +054+ | 3.21 | Randy Myers | 75.7 | CIN |
| +056+ | 3.16 | Bobby Thigpen | 75 | CHA |
| +058+ | 3.13 | Tom Henke | 65.3 | TOR |
| +063+ | 2.93 | Greg Harris | 101.7 | SDN |
| +065+ | 2.87 | Jeff Montgomery | 82 | KCA |
| +069+ | 2.72 | Gregg Olson | 65 | BAL |
| +073+ | 2.65 | Brad Arnsberg | 55 | TEX |
| +081+ | 2.45 | Barry Jones | 67 | CHA |
| +084+ | 2.42 | Jay Howell | 57 | LAN |
| +087+ | 2.4 | John Franco | 59 | NYN |
| +092+ | 2.33 | Craig Lefferts | 73.7 | SDN |
| +097+ | 2.21 | Dan Schatzeder | 64 | HOU |
| +099+ | 2.13 | Bryan Harvey | 56.7 | ANA |
| +101+ | 2.12 | Dave Smith | 56 | HOU |
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