| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 4.42 | 199007220_TOR_OAK |
| Baltimore Orioles | BAL | 2.63 | 199007220_CHA_BAL |
| Cincinnati Reds | CIN | 2.02 | 199007230_CIN_SDN |
| New York Mets | NYN | 1.19 | 199007230_NYN_PHI |
| Pittsburgh Pirates | PIT | 1.17 | 199007240_PIT_WAS |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Atlanta Braves | ATL | -6.85 | 199007241_HOU_ATL |
| Chicago Cubs | CHN | -3.46 | 199007220_SFN_CHN |
| San Diego Padres | SDN | -2.18 | 199007230_CIN_SDN |
| Montreal Expos | WAS | -1.08 | 199007230_PIT_WAS |
| St. Louis Cardinals | SLN | -1.04 | 199007220_SDN_SLN |
Based on accumulated WAA for this season up to 1990-07-24.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +014+ | 4.09 | Mark Williamson | 66.3 | BAL |
| +021+ | 3.62 | Jeff Brantley | 70.3 | SFN |
| +027+ | 3.31 | Dennis Eckersley | 41.3 | OAK |
| +029+ | 3.16 | Gregg Olson | 49 | BAL |
| +031+ | 3.14 | Doug Jones | 50 | CLE |
| +043+ | 2.72 | Steve Farr | 66.7 | KCA |
| +046+ | 2.59 | Lee Smith | 58.3 | TOT |
| +052+ | 2.44 | Gene Nelson | 43.3 | OAK |
| +053+ | 2.38 | Randy Myers | 52.3 | CIN |
| +054+ | 2.38 | Bobby Thigpen | 52.3 | CHA |
| +055+ | 2.37 | Rob Dibble | 57 | CIN |
| +059+ | 2.28 | Bill Landrum | 48.3 | PIT |
| +060+ | 2.2 | Jeff Montgomery | 61 | KCA |
| +075+ | 1.91 | Darrel Akerfelds | 57.7 | PHI |
| +076+ | 1.91 | Paul Gibson | 62.3 | DET |
| +077+ | 1.9 | Mike Schooler | 44 | SEA |
| +078+ | 1.9 | John Franco | 44 | NYN |
| +079+ | 1.89 | Keith Comstock | 34.7 | SEA |
| +081+ | 1.87 | Barry Jones | 51.3 | CHA |
| +084+ | 1.86 | Larry Andersen | 55 | HOU |
| +086+ | 1.83 | Tom Henke | 48.3 | TOR |
| +089+ | 1.75 | Terry Leach | 53.7 | MIN |
| +093+ | 1.68 | Brad Arnsberg | 30 | TEX |
| +097+ | 1.65 | Greg Harris | 72 | SDN |
| +099+ | 1.63 | Bill Sampen | 57.3 | WAS |
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