| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 8.47 | 199009290_OAK_TEX |
| Chicago White Sox | CHA | 2.07 | 199009290_SEA_CHA |
| New York Mets | NYN | 1.57 | 199009270_NYN_WAS |
| Detroit Tigers | DET | 1.33 | 199009280_MIN_DET |
| Cincinnati Reds | CIN | 0.96 | 199009280_SDN_CIN |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Atlanta Braves | ATL | -5.85 | 199009290_ATL_HOU |
| Chicago Cubs | CHN | -1.9 | 199009280_CHN_NYN |
| Philadelphia Phillies | PHI | -1.52 | 199009290_PHI_WAS |
| Houston Astros | HOU | -1.51 | 199009280_ATL_HOU |
| Toronto Blue Jays | TOR | -0.84 | 199009290_TOR_BOS |
Based on accumulated WAA for this season up to 1990-09-29.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +023+ | 5.42 | Dennis Eckersley | 72.3 | OAK |
| +029+ | 4.99 | Bill Swift | 125.3 | SEA |
| +032+ | 4.61 | Larry Andersen | 93.3 | TOT |
| +034+ | 4.59 | Rob Dibble | 96 | CIN |
| +043+ | 3.92 | Bobby Thigpen | 85.7 | CHA |
| +046+ | 3.88 | Greg Harris | 114.3 | SDN |
| +050+ | 3.68 | Gene Nelson | 74 | OAK |
| +056+ | 3.42 | Tim Crews | 105.3 | LAN |
| +059+ | 3.37 | Randy Myers | 84.7 | CIN |
| +064+ | 3.24 | Jeff Montgomery | 93.3 | KCA |
| +065+ | 3.23 | Edwin Nunez | 79.3 | DET |
| +076+ | 2.78 | Tom Henke | 71 | TOR |
| +078+ | 2.72 | Jay Howell | 65 | LAN |
| +080+ | 2.65 | Doug Jones | 82 | CLE |
| +084+ | 2.58 | Brad Arnsberg | 61.3 | TEX |
| +085+ | 2.57 | Barry Jones | 73 | CHA |
| +091+ | 2.52 | Bill Landrum | 70 | PIT |
| +094+ | 2.48 | Paul Assenmacher | 102 | CHN |
| +098+ | 2.4 | John Franco | 66 | NYN |
| +102+ | 2.35 | Gregg Olson | 72.7 | BAL |
| +107+ | 2.14 | Eric Plunk | 72.7 | NYA |
| +116+ | 2.01 | Tim Burke | 70.3 | WAS |
| +117+ | 2.01 | Steve Frey | 53.7 | WAS |
| +127+ | 1.93 | Dave Smith | 59 | HOU |
| +132+ | 1.89 | Bob Patterson | 93.3 | PIT |
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