| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 4.56 | 199006260_DET_OAK |
| Houston Astros | HOU | 2.61 | 199006260_SDN_HOU |
| Kansas City Royals | KCA | 2.1 | 199006280_KCA_SEA |
| Chicago White Sox | CHA | 1.95 | 199006270_CHA_ANA |
| Cincinnati Reds | CIN | 1.89 | 199006280_CIN_NYN |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Chicago Cubs | CHN | -5.38 | 199006260_WAS_CHN |
| Atlanta Braves | ATL | -4.56 | 199006260_LAN_ATL |
| St. Louis Cardinals | SLN | -1.21 | 199006270_NYN_SLN |
| Milwaukee Brewers | MIL | -1.07 | 199006280_MIL_NYA |
| San Francisco Giants | SFN | -0.8 | 199006260_SFN_CIN |
Based on accumulated WAA for this season up to 1990-06-28.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +017+ | 3.2 | Jeff Brantley | 58.7 | SFN |
| +020+ | 3.1 | Mark Eichhorn | 55 | ANA |
| +026+ | 2.87 | Mark Williamson | 50 | BAL |
| +029+ | 2.69 | Greg Harris | 55 | SDN |
| +032+ | 2.6 | Dennis Eckersley | 33.3 | OAK |
| +033+ | 2.59 | Gregg Olson | 40 | BAL |
| +039+ | 2.45 | Larry Andersen | 43 | HOU |
| +041+ | 2.43 | Edwin Nunez | 49 | DET |
| +045+ | 2.31 | Bill Swift | 48 | SEA |
| +048+ | 2.24 | Doug Jones | 40 | CLE |
| +051+ | 2.18 | Rob Dibble | 43 | CIN |
| +053+ | 2.07 | Barry Jones | 36.7 | CHA |
| +055+ | 2.02 | Bill Sampen | 45 | WAS |
| +057+ | 1.99 | Lee Guetterman | 49 | NYA |
| +060+ | 1.96 | Bill Landrum | 37 | PIT |
| +063+ | 1.88 | Juan Agosto | 46 | HOU |
| +066+ | 1.82 | Paul Gibson | 44.7 | DET |
| +067+ | 1.81 | Rick Aguilera | 33 | MIN |
| +070+ | 1.8 | Tom Henke | 36 | TOR |
| +069+ | 1.8 | Bobby Thigpen | 38.3 | CHA |
| +071+ | 1.78 | Jeff Montgomery | 46.7 | KCA |
| +075+ | 1.69 | Steve Farr | 45.7 | KCA |
| +076+ | 1.67 | Gene Nelson | 32.3 | OAK |
| +081+ | 1.62 | John Franco | 31.7 | NYN |
| +083+ | 1.62 | Mike Schooler | 33.7 | SEA |
_