| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 2.68 | 199008280_KCA_OAK |
| Kansas City Royals | KCA | 1.52 | 199008280_KCA_OAK |
| Cincinnati Reds | CIN | 1.51 | 199008280_SLN_CIN |
| Pittsburgh Pirates | PIT | 0.8 | 199008260_CIN_PIT |
| Montreal Expos | WAS | 0.78 | 199008270_SDN_WAS |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Atlanta Braves | ATL | -9.92 | 199008280_PIT_ATL |
| Boston Red Sox | BOS | -4.04 | 199008280_BOS_CLE |
| Philadelphia Phillies | PHI | -1.14 | 199008280_LAN_PHI |
| San Diego Padres | SDN | -1.11 | 199008280_SDN_NYN |
| Milwaukee Brewers | MIL | -0.6 | 199008260_MIL_NYA |
Based on accumulated WAA for this season up to 1990-08-28.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +017+ | 4.45 | Jeff Brantley | 82 | SFN |
| +021+ | 4.3 | Bill Swift | 108 | SEA |
| +022+ | 4.27 | Steve Farr | 95.3 | KCA |
| +026+ | 4.13 | Dennis Eckersley | 55.3 | OAK |
| +035+ | 3.59 | Doug Jones | 64.3 | CLE |
| +037+ | 3.56 | Randy Myers | 70.3 | CIN |
| +041+ | 3.37 | Rob Dibble | 77.7 | CIN |
| +043+ | 3.33 | Edwin Nunez | 64.3 | DET |
| +044+ | 3.32 | Gene Nelson | 62.7 | OAK |
| +048+ | 3.14 | Larry Andersen | 71.7 | HOU |
| +053+ | 2.95 | Lee Smith | 74.7 | TOT |
| +057+ | 2.9 | Jeff Montgomery | 78 | KCA |
| +059+ | 2.84 | Greg Harris | 93.3 | SDN |
| +061+ | 2.77 | Tom Henke | 61.3 | TOR |
| +064+ | 2.67 | Bobby Thigpen | 69.7 | CHA |
| +066+ | 2.65 | Brad Arnsberg | 50.3 | TEX |
| +068+ | 2.63 | John Franco | 57 | NYN |
| +071+ | 2.54 | Gregg Olson | 63 | BAL |
| +078+ | 2.41 | Tim Crews | 80 | LAN |
| +079+ | 2.41 | Barry Jones | 64.3 | CHA |
| +084+ | 2.25 | Jay Howell | 55 | LAN |
| +090+ | 2.12 | Mike Schooler | 56 | SEA |
| +092+ | 2.11 | Craig Lefferts | 71 | SDN |
| +093+ | 2.08 | Dan Schatzeder | 60 | HOU |
| +095+ | 2.05 | Bryan Harvey | 53.3 | ANA |
_