| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 5.46 | 199006200_OAK_DET |
| Kansas City Royals | KCA | 2.28 | 199006200_SEA_KCA |
| Cincinnati Reds | CIN | 2.05 | 199006191_CIN_ATL |
| Houston Astros | HOU | 1.96 | 199006180_HOU_LAN |
| Baltimore Orioles | BAL | 1.36 | 199006200_BAL_CLE |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Atlanta Braves | ATL | -3.26 | 199006200_CIN_ATL |
| St. Louis Cardinals | SLN | -2.91 | 199006200_SLN_NYN |
| Chicago Cubs | CHN | -2.76 | 199006190_CHN_WAS |
| California Angels | ANA | -1 | 199006190_ANA_CHA |
| Philadelphia Phillies | PHI | -0.84 | 199006200_PIT_PHI |
Based on accumulated WAA for this season up to 1990-06-20.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +013+ | 3.36 | Mark Eichhorn | 51.3 | ANA |
| +021+ | 2.84 | Gregg Olson | 38.3 | BAL |
| +023+ | 2.77 | Jeff Brantley | 54.3 | SFN |
| +031+ | 2.51 | Mark Williamson | 46.3 | BAL |
| +036+ | 2.4 | Dennis Eckersley | 31.3 | OAK |
| +037+ | 2.33 | Greg Harris | 51.3 | SDN |
| +038+ | 2.32 | Craig Lefferts | 39.7 | SDN |
| +043+ | 2.2 | Rob Dibble | 38.7 | CIN |
| +044+ | 2.16 | Bill Swift | 44.3 | SEA |
| +046+ | 2.13 | Larry Andersen | 39.7 | HOU |
| +052+ | 1.98 | Bill Landrum | 33 | PIT |
| +053+ | 1.96 | Doug Jones | 35 | CLE |
| +057+ | 1.88 | Bill Sampen | 39.3 | WAS |
| +058+ | 1.88 | Paul Gibson | 43.7 | DET |
| +059+ | 1.87 | Bobby Thigpen | 34.7 | CHA |
| +061+ | 1.82 | Edwin Nunez | 43 | DET |
| +064+ | 1.73 | Rick Aguilera | 30 | MIN |
| +065+ | 1.73 | Tom Henke | 35.3 | TOR |
| +067+ | 1.69 | Jeff Montgomery | 44 | KCA |
| +069+ | 1.68 | Gene Nelson | 30.3 | OAK |
| +072+ | 1.66 | Barry Jones | 32.3 | CHA |
| +074+ | 1.65 | Lee Guetterman | 40.7 | NYA |
| +084+ | 1.53 | Juan Agosto | 42.3 | HOU |
| +090+ | 1.48 | Terry Leach | 36.3 | MIN |
| +092+ | 1.46 | Mike Henneman | 41.3 | DET |
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