| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 2.93 | 199008180_OAK_BAL |
| Pittsburgh Pirates | PIT | 1.15 | 199008160_ATL_PIT |
| Baltimore Orioles | BAL | 1.09 | 199008180_OAK_BAL |
| Kansas City Royals | KCA | 1.04 | 199008180_KCA_MIL |
| Chicago White Sox | CHA | 0.6 | 199008180_CHA_TEX |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Atlanta Braves | ATL | -7.41 | 199008170_ATL_CHN |
| Boston Red Sox | BOS | -2.63 | 199008180_ANA_BOS |
| Chicago Cubs | CHN | -1.99 | 199008180_ATL_CHN |
| Detroit Tigers | DET | -1 | 199008180_CLE_DET |
| San Diego Padres | SDN | -0.87 | 199008170_PHI_SDN |
Based on accumulated WAA for this season up to 1990-08-18.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +019+ | 4.23 | Jeff Brantley | 79 | SFN |
| +021+ | 3.99 | Mark Williamson | 85.3 | BAL |
| +024+ | 3.93 | Doug Jones | 60.7 | CLE |
| +027+ | 3.9 | Gregg Olson | 59 | BAL |
| +029+ | 3.88 | Dennis Eckersley | 52.3 | OAK |
| +034+ | 3.54 | Steve Farr | 86.7 | KCA |
| +040+ | 3.21 | Greg Harris | 92.3 | SDN |
| +045+ | 3.1 | Gene Nelson | 57.7 | OAK |
| +046+ | 3.08 | Randy Myers | 64.7 | CIN |
| +047+ | 3.08 | Rob Dibble | 71.7 | CIN |
| +048+ | 3.07 | Edwin Nunez | 58.7 | DET |
| +054+ | 2.91 | Lee Smith | 73.7 | TOT |
| +058+ | 2.77 | Jeff Montgomery | 71.3 | KCA |
| +059+ | 2.76 | Larry Andersen | 67 | HOU |
| +060+ | 2.75 | Tom Henke | 58.3 | TOR |
| +062+ | 2.74 | Brad Arnsberg | 44 | TEX |
| +064+ | 2.68 | Bobby Thigpen | 64.7 | CHA |
| +066+ | 2.58 | John Franco | 53.7 | NYN |
| +077+ | 2.32 | Barry Jones | 60.7 | CHA |
| +081+ | 2.26 | Tim Crews | 77.3 | LAN |
| +084+ | 2.22 | Bill Landrum | 59.3 | PIT |
| +090+ | 2.05 | Craig Lefferts | 67.7 | SDN |
| +098+ | 1.99 | Mike Schooler | 54.3 | SEA |
| +100+ | 1.98 | Darrel Akerfelds | 77 | PHI |
| +105+ | 1.9 | Terry Leach | 69 | MIN |
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