| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 5.26 | 199007040_OAK_MIL |
| Cincinnati Reds | CIN | 2.79 | 199007030_CIN_WAS |
| Houston Astros | HOU | 2.07 | 199007020_HOU_PHI |
| Chicago White Sox | CHA | 2.04 | 199007020_DET_CHA |
| Detroit Tigers | DET | 1.58 | 199007040_DET_CHA |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Atlanta Braves | ATL | -3.81 | 199007040_ATL_PHI |
| Chicago Cubs | CHN | -2.61 | 199007040_CHN_LAN |
| Philadelphia Phillies | PHI | -1.47 | 199007040_ATL_PHI |
| St. Louis Cardinals | SLN | -1.29 | 199007040_SLN_SFN |
| Milwaukee Brewers | MIL | -1.27 | 199007030_OAK_MIL |
Based on accumulated WAA for this season up to 1990-07-04.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +013+ | 3.54 | Jeff Brantley | 62.3 | SFN |
| +019+ | 3.28 | Mark Eichhorn | 56.7 | ANA |
| +024+ | 3.01 | Mark Williamson | 51.3 | BAL |
| +026+ | 2.84 | Greg Harris | 61.7 | SDN |
| +028+ | 2.79 | Dennis Eckersley | 35.3 | OAK |
| +031+ | 2.73 | Edwin Nunez | 54.7 | DET |
| +035+ | 2.57 | Doug Jones | 43.7 | CLE |
| +036+ | 2.53 | Rob Dibble | 46.7 | CIN |
| +037+ | 2.51 | Gregg Olson | 41.3 | BAL |
| +041+ | 2.31 | Bill Landrum | 41 | PIT |
| +049+ | 2.2 | Bill Sampen | 47 | WAS |
| +051+ | 2.18 | Bobby Thigpen | 42.7 | CHA |
| +052+ | 2.16 | Tom Henke | 40 | TOR |
| +053+ | 2.15 | Steve Farr | 53 | KCA |
| +054+ | 2.12 | Paul Gibson | 50.3 | DET |
| +061+ | 1.94 | Bill Swift | 51 | SEA |
| +063+ | 1.9 | Jeff Montgomery | 50.3 | KCA |
| +064+ | 1.89 | Gene Nelson | 34.7 | OAK |
| +065+ | 1.85 | Dennis Lamp | 56.7 | BOS |
| +070+ | 1.78 | Scott Radinsky | 33.7 | CHA |
| +073+ | 1.76 | Barry Jones | 40.3 | CHA |
| +075+ | 1.74 | Mike Schooler | 37.3 | SEA |
| +077+ | 1.69 | John Franco | 34.7 | NYN |
| +078+ | 1.68 | Juan Agosto | 52.7 | HOU |
| +082+ | 1.63 | Randy Myers | 43.7 | CIN |
_