| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 3.91 | 199008020_OAK_ANA |
| Cincinnati Reds | CIN | 1.52 | 199008030_SDN_CIN |
| Pittsburgh Pirates | PIT | 1.5 | 199008020_PIT_CHN |
| Cleveland Indians | CLE | 1.29 | 199008040_CLE_NYA |
| Houston Astros | HOU | 0.94 | 199008020_ATL_HOU |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Detroit Tigers | DET | -5.05 | 199008040_DET_BOS |
| Chicago Cubs | CHN | -4.66 | 199008030_WAS_CHN |
| Atlanta Braves | ATL | -3.11 | 199008020_ATL_HOU |
| Boston Red Sox | BOS | -2.39 | 199008030_DET_BOS |
| Minnesota Twins | MIN | -0.73 | 199008030_MIN_SEA |
Based on accumulated WAA for this season up to 1990-08-04.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +018+ | 4.02 | Jeff Brantley | 74.3 | SFN |
| +023+ | 3.77 | Mark Williamson | 76 | BAL |
| +026+ | 3.65 | Gregg Olson | 54 | BAL |
| +028+ | 3.57 | Doug Jones | 54.3 | CLE |
| +030+ | 3.41 | Dennis Eckersley | 47 | OAK |
| +037+ | 3.02 | Steve Farr | 76 | KCA |
| +043+ | 2.85 | Tom Candiotti | 139.3 | CLE |
| +045+ | 2.76 | Randy Myers | 58.3 | CIN |
| +048+ | 2.72 | Lee Smith | 66 | TOT |
| +050+ | 2.7 | Rob Dibble | 64.7 | CIN |
| +051+ | 2.69 | Bobby Thigpen | 57.7 | CHA |
| +054+ | 2.64 | Gene Nelson | 50 | OAK |
| +060+ | 2.49 | Greg Harris | 83.3 | SDN |
| +067+ | 2.38 | Brad Arnsberg | 37.7 | TEX |
| +068+ | 2.38 | John Franco | 49 | NYN |
| +070+ | 2.3 | Jeff Montgomery | 66 | KCA |
| +073+ | 2.22 | Larry Andersen | 58.3 | HOU |
| +076+ | 2.15 | Barry Jones | 56.3 | CHA |
| +077+ | 2.13 | Tom Henke | 51.3 | TOR |
| +078+ | 2.11 | Terry Leach | 64.3 | MIN |
| +080+ | 2.07 | Dennis Cook | 111.7 | PHI |
| +081+ | 2.05 | Zane Smith | 133.3 | WAS |
| +082+ | 2.05 | Darrel Akerfelds | 65.7 | PHI |
| +083+ | 2.04 | Mike Schooler | 50 | SEA |
| +084+ | 2.04 | Bill Landrum | 52.3 | PIT |
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