| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 4.71 | 199006100_KCA_OAK |
| Houston Astros | HOU | 2.94 | 199006120_LAN_HOU |
| Chicago White Sox | CHA | 2.38 | 199006100_CHA_MIN |
| Kansas City Royals | KCA | 2.29 | 199006100_KCA_OAK |
| Cincinnati Reds | CIN | 1.51 | 199006121_ATL_CIN |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Atlanta Braves | ATL | -8.91 | 199006110_SFN_ATL |
| Philadelphia Phillies | PHI | -3.44 | 199006100_PHI_CHN |
| New York Yankees | NYA | -1.22 | 199006100_NYA_BAL |
| California Angels | ANA | -0.91 | 199006100_TEX_ANA |
| Chicago Cubs | CHN | -0.86 | 199006100_PHI_CHN |
Based on accumulated WAA for this season up to 1990-06-12.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +014+ | 2.91 | Mark Eichhorn | 46.3 | ANA |
| +017+ | 2.78 | Gregg Olson | 35.3 | BAL |
| +024+ | 2.52 | Jeff Brantley | 44.3 | SFN |
| +034+ | 2.16 | Dennis Eckersley | 28.7 | OAK |
| +039+ | 2.03 | Mark Williamson | 38.7 | BAL |
| +041+ | 2 | Rob Dibble | 34 | CIN |
| +043+ | 1.95 | Bill Landrum | 30.3 | PIT |
| +044+ | 1.95 | Larry Andersen | 35.7 | HOU |
| +048+ | 1.87 | Craig Lefferts | 32 | SDN |
| +050+ | 1.84 | Doug Jones | 31.3 | CLE |
| +054+ | 1.77 | Jeff Montgomery | 40 | KCA |
| +055+ | 1.77 | Greg Harris | 44.7 | SDN |
| +058+ | 1.73 | Barry Jones | 28.3 | CHA |
| +067+ | 1.56 | Bill Sampen | 33.3 | WAS |
| +073+ | 1.52 | Bobby Thigpen | 30.7 | CHA |
| +074+ | 1.49 | Wayne Edwards | 28 | CHA |
| +077+ | 1.48 | Paul Gibson | 39 | DET |
| +076+ | 1.48 | Lee Guetterman | 34 | NYA |
| +079+ | 1.47 | Tom Henke | 30 | TOR |
| +082+ | 1.44 | Rick Aguilera | 27 | MIN |
| +081+ | 1.44 | Gene Nelson | 27.7 | OAK |
| +086+ | 1.38 | Rick Honeycutt | 24.7 | OAK |
| +088+ | 1.38 | Bill Swift | 35.7 | SEA |
| +090+ | 1.36 | Mike Schooler | 28.7 | SEA |
| +091+ | 1.36 | Bill Krueger | 49 | MIL |
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