| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 4.8 | 199007200_TOR_OAK |
| Baltimore Orioles | BAL | 2.76 | 199007200_CHA_BAL |
| Cincinnati Reds | CIN | 1.93 | 199007210_PHI_CIN |
| Pittsburgh Pirates | PIT | 1.35 | 199007210_LAN_PIT |
| Chicago White Sox | CHA | 0.87 | 199007190_CHA_BAL |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Atlanta Braves | ATL | -5.4 | 199007210_ATL_NYN |
| Chicago Cubs | CHN | -3.62 | 199007200_SFN_CHN |
| St. Louis Cardinals | SLN | -1.41 | 199007190_SDN_SLN |
| California Angels | ANA | -1.21 | 199007210_CLE_ANA |
| Montreal Expos | WAS | -1.07 | 199007210_WAS_HOU |
Based on accumulated WAA for this season up to 1990-07-21.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +013+ | 4.16 | Mark Williamson | 65 | BAL |
| +018+ | 3.59 | Jeff Brantley | 70.3 | SFN |
| +027+ | 3.22 | Dennis Eckersley | 40.3 | OAK |
| +031+ | 3.05 | Gregg Olson | 48 | BAL |
| +032+ | 3.03 | Doug Jones | 49 | CLE |
| +045+ | 2.47 | Steve Farr | 63.7 | KCA |
| +046+ | 2.43 | Lee Smith | 56.7 | TOT |
| +048+ | 2.38 | Gene Nelson | 40.3 | OAK |
| +053+ | 2.29 | Tom Henke | 46.3 | TOR |
| +056+ | 2.27 | Rob Dibble | 56 | CIN |
| +055+ | 2.27 | Bobby Thigpen | 51.3 | CHA |
| +054+ | 2.27 | Randy Myers | 51.3 | CIN |
| +057+ | 2.27 | Bill Landrum | 48.3 | PIT |
| +062+ | 2.16 | Jeff Montgomery | 58 | KCA |
| +070+ | 1.99 | Greg Harris | 69 | SDN |
| +078+ | 1.89 | Keith Comstock | 34.7 | SEA |
| +077+ | 1.89 | Paul Gibson | 62.3 | DET |
| +082+ | 1.78 | Mike Schooler | 42.7 | SEA |
| +083+ | 1.76 | Barry Jones | 50.3 | CHA |
| +085+ | 1.75 | Larry Andersen | 54 | HOU |
| +089+ | 1.71 | John Franco | 42 | NYN |
| +094+ | 1.65 | Bill Sampen | 55.3 | WAS |
| +095+ | 1.63 | Darrel Akerfelds | 54.7 | PHI |
| +103+ | 1.49 | Brad Arnsberg | 28 | TEX |
| +105+ | 1.47 | Ben McDonald | 18.7 | BAL |
_