| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 8.47 | 199009290_OAK_TEX |
| Chicago White Sox | CHA | 2.11 | 199009300_SEA_CHA |
| Detroit Tigers | DET | 1.33 | 199009280_MIN_DET |
| Montreal Expos | WAS | 1.3 | 199009300_PHI_WAS |
| Cincinnati Reds | CIN | 0.96 | 199009280_SDN_CIN |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Atlanta Braves | ATL | -6.68 | 199009300_ATL_HOU |
| Chicago Cubs | CHN | -1.9 | 199009280_CHN_NYN |
| Philadelphia Phillies | PHI | -1.57 | 199009300_PHI_WAS |
| Houston Astros | HOU | -1.52 | 199009300_ATL_HOU |
| Boston Red Sox | BOS | -1.16 | 199009300_TOR_BOS |
Based on accumulated WAA for this season up to 1990-09-30.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +024+ | 5.41 | Dennis Eckersley | 72.3 | OAK |
| +029+ | 4.98 | Bill Swift | 125.3 | SEA |
| +034+ | 4.59 | Larry Andersen | 93.3 | TOT |
| +036+ | 4.58 | Rob Dibble | 96 | CIN |
| +042+ | 4.13 | Greg Harris | 117.3 | SDN |
| +043+ | 4 | Bobby Thigpen | 86.7 | CHA |
| +051+ | 3.67 | Gene Nelson | 74 | OAK |
| +057+ | 3.42 | Tim Crews | 105.3 | LAN |
| +059+ | 3.36 | Randy Myers | 84.7 | CIN |
| +062+ | 3.32 | Jeff Montgomery | 94.3 | KCA |
| +064+ | 3.27 | Lee Smith | 83 | TOT |
| +065+ | 3.22 | Edwin Nunez | 79.3 | DET |
| +075+ | 2.86 | Tom Henke | 72 | TOR |
| +077+ | 2.76 | Doug Jones | 83.3 | CLE |
| +084+ | 2.56 | Barry Jones | 73 | CHA |
| +087+ | 2.51 | Bill Landrum | 70 | PIT |
| +093+ | 2.47 | Paul Assenmacher | 102 | CHN |
| +098+ | 2.37 | Gregg Olson | 73 | BAL |
| +099+ | 2.36 | Brad Arnsberg | 61.3 | TEX |
| +111+ | 2.13 | Eric Plunk | 72.7 | NYA |
| +112+ | 2.12 | John Franco | 67.7 | NYN |
| +115+ | 2.09 | Tim Burke | 71.3 | WAS |
| +120+ | 2 | Steve Frey | 53.7 | WAS |
| +130+ | 1.92 | Dave Smith | 59 | HOU |
| +133+ | 1.88 | Bob Patterson | 93.3 | PIT |
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