| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 4.55 | 199006110_TEX_OAK |
| Houston Astros | HOU | 3.16 | 199006130_LAN_HOU |
| Chicago White Sox | CHA | 2.05 | 199006110_CHA_SEA |
| Kansas City Royals | KCA | 2.04 | 199006110_KCA_ANA |
| Cincinnati Reds | CIN | 1.57 | 199006130_ATL_CIN |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Atlanta Braves | ATL | -8.91 | 199006110_SFN_ATL |
| Philadelphia Phillies | PHI | -2.13 | 199006111_WAS_PHI |
| New York Yankees | NYA | -1.02 | 199006130_BOS_NYA |
| California Angels | ANA | -0.78 | 199006110_KCA_ANA |
| Milwaukee Brewers | MIL | -0.6 | 199006130_MIL_BAL |
Based on accumulated WAA for this season up to 1990-06-13.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +016+ | 2.96 | Mark Eichhorn | 46.7 | ANA |
| +019+ | 2.8 | Gregg Olson | 35.3 | BAL |
| +027+ | 2.54 | Jeff Brantley | 44.3 | SFN |
| +035+ | 2.17 | Dennis Eckersley | 28.7 | OAK |
| +040+ | 2.05 | Mark Williamson | 38.7 | BAL |
| +042+ | 2.01 | Rob Dibble | 34 | CIN |
| +046+ | 1.97 | Larry Andersen | 35.7 | HOU |
| +045+ | 1.97 | Bill Landrum | 30.3 | PIT |
| +050+ | 1.88 | Craig Lefferts | 32 | SDN |
| +051+ | 1.86 | Doug Jones | 31.3 | CLE |
| +056+ | 1.78 | Greg Harris | 44.7 | SDN |
| +057+ | 1.78 | Jeff Montgomery | 40 | KCA |
| +059+ | 1.75 | Bill Sampen | 35.3 | WAS |
| +061+ | 1.74 | Barry Jones | 28.3 | CHA |
| +064+ | 1.67 | Tom Henke | 32 | TOR |
| +065+ | 1.66 | Gene Nelson | 30 | OAK |
| +066+ | 1.64 | Bill Swift | 38.3 | SEA |
| +071+ | 1.53 | Bobby Thigpen | 30.7 | CHA |
| +072+ | 1.52 | Paul Gibson | 39.3 | DET |
| +076+ | 1.5 | Wayne Edwards | 28 | CHA |
| +077+ | 1.49 | Lee Guetterman | 34 | NYA |
| +080+ | 1.48 | Rick Honeycutt | 25.7 | OAK |
| +082+ | 1.46 | Rick Aguilera | 27 | MIN |
| +088+ | 1.38 | Mike Schooler | 28.7 | SEA |
| +096+ | 1.31 | Dennis Lamp | 44 | BOS |
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