| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 4.02 | 199008200_OAK_CHA |
| Kansas City Royals | KCA | 1.25 | 199008200_MIN_KCA |
| Baltimore Orioles | BAL | 1.2 | 199008190_OAK_BAL |
| Pittsburgh Pirates | PIT | 1.01 | 199008200_HOU_PIT |
| Chicago White Sox | CHA | 0.73 | 199008200_OAK_CHA |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Atlanta Braves | ATL | -9.69 | 199008200_ATL_SLN |
| Chicago Cubs | CHN | -2.91 | 199008190_ATL_CHN |
| Boston Red Sox | BOS | -2.63 | 199008180_ANA_BOS |
| Milwaukee Brewers | MIL | -1.95 | 199008200_CLE_MIL |
| Detroit Tigers | DET | -1 | 199008180_CLE_DET |
Based on accumulated WAA for this season up to 1990-08-20.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +022+ | 4.21 | Jeff Brantley | 79 | SFN |
| +025+ | 3.98 | Mark Williamson | 85.3 | BAL |
| +026+ | 3.93 | Doug Jones | 60.7 | CLE |
| +029+ | 3.87 | Steve Farr | 90.3 | KCA |
| +028+ | 3.87 | Dennis Eckersley | 52.3 | OAK |
| +033+ | 3.56 | Gregg Olson | 60 | BAL |
| +042+ | 3.19 | Greg Harris | 92.3 | SDN |
| +041+ | 3.19 | Rob Dibble | 73 | CIN |
| +044+ | 3.09 | Gene Nelson | 57.7 | OAK |
| +045+ | 3.08 | Randy Myers | 64.7 | CIN |
| +052+ | 2.89 | Lee Smith | 73.7 | TOT |
| +054+ | 2.88 | Edwin Nunez | 59 | DET |
| +055+ | 2.85 | Jeff Montgomery | 72.3 | KCA |
| +058+ | 2.82 | Brad Arnsberg | 45 | TEX |
| +061+ | 2.76 | Larry Andersen | 67 | HOU |
| +060+ | 2.76 | Bobby Thigpen | 65.7 | CHA |
| +062+ | 2.73 | Tom Henke | 58.3 | TOR |
| +067+ | 2.55 | John Franco | 55.7 | NYN |
| +086+ | 2.25 | Tim Crews | 77.3 | LAN |
| +085+ | 2.25 | Barry Jones | 62.3 | CHA |
| +091+ | 2.09 | Bill Landrum | 60.3 | PIT |
| +092+ | 2.05 | Dan Schatzeder | 57 | HOU |
| +094+ | 2.01 | Craig Lefferts | 69.7 | SDN |
| +095+ | 2 | Darrel Akerfelds | 77.3 | PHI |
| +100+ | 1.98 | Mike Schooler | 54.3 | SEA |
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