| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 5.64 | 199006030_OAK_KCA |
| Cincinnati Reds | CIN | 2.66 | 199006030_CIN_LAN |
| Chicago White Sox | CHA | 2.04 | 199006030_MIN_CHA |
| New York Mets | NYN | 1.81 | 199006040_WAS_NYN |
| Houston Astros | HOU | 0.77 | 199006020_HOU_SFN |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Atlanta Braves | ATL | -3.13 | 199006020_ATL_SDN |
| Chicago Cubs | CHN | -1.9 | 199006040_CHN_PIT |
| Montreal Expos | WAS | -1.63 | 199006030_WAS_PIT |
| California Angels | ANA | -1.58 | 199006020_ANA_TEX |
| Seattle Mariners | SEA | -1.12 | 199006020_DET_SEA |
Based on accumulated WAA for this season up to 1990-06-04.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +011+ | 2.67 | Gregg Olson | 32 | BAL |
| +019+ | 2.39 | Mark Eichhorn | 41 | ANA |
| +021+ | 2.28 | Jeff Brantley | 39.7 | SFN |
| +038+ | 1.83 | Mark Williamson | 32 | BAL |
| +039+ | 1.81 | Bill Landrum | 27 | PIT |
| +045+ | 1.69 | Greg Harris | 39.3 | SDN |
| +043+ | 1.69 | Rob Dibble | 28.7 | CIN |
| +046+ | 1.67 | Doug Jones | 29.7 | CLE |
| +049+ | 1.63 | Dennis Eckersley | 23 | OAK |
| +051+ | 1.59 | Paul Assenmacher | 38.7 | CHN |
| +055+ | 1.55 | Larry Andersen | 31.7 | HOU |
| +059+ | 1.47 | Mike Schooler | 25.7 | SEA |
| +062+ | 1.46 | Jeff Montgomery | 37.3 | KCA |
| +070+ | 1.37 | Barry Jones | 24.7 | CHA |
| +069+ | 1.37 | Wayne Edwards | 24.7 | CHA |
| +072+ | 1.36 | Lee Smith | 33.7 | TOT |
| +073+ | 1.34 | Bill Sampen | 29 | WAS |
| +075+ | 1.32 | Paul Gibson | 35.3 | DET |
| +077+ | 1.26 | Gene Nelson | 26 | OAK |
| XXXXX | 1.24 | Bill Swift | 34.7 | SEA |
| XXXXX | 1.24 | Dennis Lamp | 39 | BOS |
| XXXXX | 1.23 | Rick Aguilera | 25 | MIN |
| XXXXX | 1.22 | Craig Lefferts | 25 | SDN |
| XXXXX | 1.17 | Mitch Williams | 29.3 | CHN |
| XXXXX | 1.17 | Tom Henke | 27 | TOR |
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