| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 6.88 | 199006070_OAK_TEX |
| Kansas City Royals | KCA | 2.59 | 199006090_KCA_OAK |
| Chicago White Sox | CHA | 2.37 | 199006090_CHA_MIN |
| Houston Astros | HOU | 1.95 | 199006080_CIN_HOU |
| Cincinnati Reds | CIN | 1.83 | 199006070_CIN_HOU |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Atlanta Braves | ATL | -4.43 | 199006090_SFN_ATL |
| Philadelphia Phillies | PHI | -3.8 | 199006090_PHI_CHN |
| Chicago Cubs | CHN | -1.72 | 199006080_PHI_CHN |
| St. Louis Cardinals | SLN | -1.7 | 199006090_SLN_WAS |
| Montreal Expos | WAS | -1.38 | 199006070_SLN_WAS |
Based on accumulated WAA for this season up to 1990-06-09.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +014+ | 2.83 | Mark Eichhorn | 45.3 | ANA |
| +016+ | 2.77 | Gregg Olson | 35 | BAL |
| +024+ | 2.38 | Jeff Brantley | 42.7 | SFN |
| +038+ | 1.95 | Bill Landrum | 28 | PIT |
| +042+ | 1.93 | Dennis Eckersley | 26 | OAK |
| +047+ | 1.78 | Larry Andersen | 33.7 | HOU |
| +050+ | 1.75 | Mark Williamson | 35.3 | BAL |
| +053+ | 1.73 | Craig Lefferts | 30.3 | SDN |
| +058+ | 1.7 | Jeff Montgomery | 39.3 | KCA |
| +057+ | 1.7 | Barry Jones | 28 | CHA |
| +059+ | 1.69 | Greg Harris | 43.7 | SDN |
| +060+ | 1.67 | Rob Dibble | 30.3 | CIN |
| +062+ | 1.61 | Wayne Edwards | 27 | CHA |
| +066+ | 1.48 | Tom Henke | 30 | TOR |
| +070+ | 1.47 | Bill Sampen | 30 | WAS |
| +071+ | 1.43 | Bobby Thigpen | 29.7 | CHA |
| +072+ | 1.42 | Rick Aguilera | 26.7 | MIN |
| +074+ | 1.39 | Paul Gibson | 38 | DET |
| +076+ | 1.36 | Gene Nelson | 26.7 | OAK |
| +079+ | 1.32 | Bill Swift | 35 | SEA |
| +082+ | 1.3 | Steve Farr | 32.7 | KCA |
| +081+ | 1.3 | Edwin Nunez | 37 | DET |
| +084+ | 1.29 | Terry Leach | 34.3 | MIN |
| +085+ | 1.28 | Dennis Lamp | 41.3 | BOS |
| +087+ | 1.28 | Mike Schooler | 27.7 | SEA |
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