| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 4.85 | 199006020_OAK_KCA |
| Kansas City Royals | KCA | 2.16 | 199006010_OAK_KCA |
| Cincinnati Reds | CIN | 1.96 | 199006020_CIN_LAN |
| Chicago White Sox | CHA | 1.71 | 199006020_MIN_CHA |
| Houston Astros | HOU | 1.05 | 199005310_HOU_SFN |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Atlanta Braves | ATL | -3.13 | 199006020_ATL_SDN |
| Chicago Cubs | CHN | -1.76 | 199006010_CHN_SLN |
| Montreal Expos | WAS | -1.62 | 199006010_WAS_PIT |
| California Angels | ANA | -1.58 | 199006020_ANA_TEX |
| Seattle Mariners | SEA | -1.35 | 199006010_DET_SEA |
Based on accumulated WAA for this season up to 1990-06-02.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +015+ | 2.43 | Gregg Olson | 29.3 | BAL |
| +016+ | 2.42 | Mark Eichhorn | 39 | ANA |
| +021+ | 2.17 | Juan Agosto | 34 | HOU |
| +026+ | 2.08 | Jeff Brantley | 37.3 | SFN |
| +033+ | 1.91 | Greg Harris | 37 | SDN |
| +039+ | 1.75 | Bill Landrum | 26.3 | PIT |
| +041+ | 1.74 | Mark Williamson | 31 | BAL |
| +042+ | 1.69 | Rob Dibble | 28.7 | CIN |
| +043+ | 1.68 | Doug Jones | 29.7 | CLE |
| +049+ | 1.62 | Dennis Eckersley | 23 | OAK |
| +052+ | 1.58 | Paul Assenmacher | 38.7 | CHN |
| +064+ | 1.39 | Mike Schooler | 24.7 | SEA |
| +071+ | 1.37 | Larry Andersen | 29.7 | HOU |
| +070+ | 1.37 | Barry Jones | 24.7 | CHA |
| +072+ | 1.37 | Danny Darwin | 29.7 | HOU |
| +067+ | 1.37 | Jeff Montgomery | 36.3 | KCA |
| +069+ | 1.37 | Wayne Edwards | 24.7 | CHA |
| +076+ | 1.33 | Paul Gibson | 35.3 | DET |
| +077+ | 1.29 | Craig Lefferts | 23.3 | SDN |
| +078+ | 1.28 | Lee Smith | 32.7 | TOT |
| +080+ | 1.26 | Gene Nelson | 26 | OAK |
| XXXXX | 1.25 | Dennis Lamp | 39 | BOS |
| XXXXX | 1.24 | Bill Swift | 34.7 | SEA |
| XXXXX | 1.23 | Rick Aguilera | 25 | MIN |
| XXXXX | 1.16 | Ken Patterson | 24.7 | CHA |
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