| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 4.83 | 199006240_CHA_OAK |
| Houston Astros | HOU | 2.79 | 199006250_SDN_HOU |
| Chicago White Sox | CHA | 1.85 | 199006260_CHA_ANA |
| Cincinnati Reds | CIN | 1.74 | 199006240_LAN_CIN |
| Kansas City Royals | KCA | 1.51 | 199006240_KCA_MIN |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Chicago Cubs | CHN | -5.38 | 199006260_WAS_CHN |
| Atlanta Braves | ATL | -5.05 | 199006250_LAN_ATL |
| Boston Red Sox | BOS | -1.64 | 199006240_BAL_BOS |
| St. Louis Cardinals | SLN | -1.46 | 199006240_SLN_CHN |
| San Francisco Giants | SFN | -0.93 | 199006250_SFN_CIN |
Based on accumulated WAA for this season up to 1990-06-26.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +019+ | 3.2 | Jeff Brantley | 58.7 | SFN |
| +023+ | 3.1 | Mark Eichhorn | 55 | ANA |
| +029+ | 2.67 | Mark Williamson | 47.7 | BAL |
| +031+ | 2.6 | Dennis Eckersley | 33.3 | OAK |
| +033+ | 2.54 | Greg Harris | 53.3 | SDN |
| +035+ | 2.51 | Gregg Olson | 39 | BAL |
| +041+ | 2.31 | Bill Swift | 48 | SEA |
| +042+ | 2.3 | Bill Sampen | 43.7 | WAS |
| +046+ | 2.24 | Doug Jones | 40 | CLE |
| +045+ | 2.24 | Larry Andersen | 40.7 | HOU |
| +051+ | 2.17 | Rob Dibble | 43 | CIN |
| +052+ | 2.12 | Edwin Nunez | 45.7 | DET |
| +053+ | 2.07 | Barry Jones | 36.7 | CHA |
| +058+ | 1.92 | Jeff Montgomery | 46 | KCA |
| +060+ | 1.9 | Lee Guetterman | 48 | NYA |
| +064+ | 1.82 | Paul Gibson | 44.7 | DET |
| +065+ | 1.81 | Rick Aguilera | 33 | MIN |
| +067+ | 1.8 | Bobby Thigpen | 38.3 | CHA |
| +068+ | 1.8 | Juan Agosto | 45 | HOU |
| +069+ | 1.79 | Tom Henke | 36 | TOR |
| +070+ | 1.77 | Bill Landrum | 35 | PIT |
| +079+ | 1.67 | Gene Nelson | 32.3 | OAK |
| +082+ | 1.59 | Danny Darwin | 45 | HOU |
| +083+ | 1.58 | Steve Farr | 44.7 | KCA |
| +087+ | 1.53 | Lee Smith | 44.3 | TOT |
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