| Team | Tm | Tier | Game |
|---|---|---|---|
| New York Mets | NYN | 4.87 | 199004200_WAS_NYN |
| Kansas City Royals | KCA | 3.87 | 199004200_KCA_TOR |
| Oakland Athletics | OAK | 3.59 | 199004200_SEA_OAK |
| Cincinnati Reds | CIN | 2.65 | 199004180_SDN_CIN |
| New York Yankees | NYA | 0.51 | 199004200_NYA_TEX |
| Team | Tm | Tier | Game |
|---|---|---|---|
| San Francisco Giants | SFN | -3.67 | 199004200_SFN_SDN |
| Atlanta Braves | ATL | -3.56 | 199004180_ATL_HOU |
| California Angels | ANA | -2.83 | 199004200_ANA_MIN |
| Detroit Tigers | DET | -1.54 | 199004180_NYA_DET |
| Minnesota Twins | MIN | -0.85 | 199004180_MIN_SEA |
Based on accumulated WAA for this season up to 1990-04-20.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| XXXXX | 0.81 | Terry Leach | 9 | MIN |
| XXXXX | 0.8 | Rob Dibble | 9.3 | CIN |
| XXXXX | 0.73 | Dan Petry | 8 | DET |
| XXXXX | 0.72 | Duane Ward | 8 | TOR |
| XXXXX | 0.72 | Tim Crews | 8 | LAN |
| XXXXX | 0.69 | Paul Assenmacher | 10.3 | CHN |
| XXXXX | 0.64 | Brian Holman | 21 | SEA |
| XXXXX | 0.63 | Cecilio Guante | 6.7 | CLE |
| XXXXX | 0.59 | Bob Tewksbury | 6.7 | SLN |
| XXXXX | 0.57 | Ted Power | 6.3 | PIT |
| XXXXX | 0.57 | Gene Nelson | 6.7 | OAK |
| XXXXX | 0.57 | Dave Smith | 6.7 | HOU |
| XXXXX | 0.57 | Greg Harris | 11 | SDN |
| XXXXX | 0.56 | Greg Minton | 6.7 | ANA |
| XXXXX | 0.55 | Mitch Williams | 6.3 | CHN |
| XXXXX | 0.52 | Gregg Olson | 5.7 | BAL |
| XXXXX | 0.48 | Ray Searage | 5.3 | LAN |
| XXXXX | 0.48 | Dave Wells | 7.7 | TOR |
| XXXXX | 0.47 | Barry Jones | 5.3 | CHA |
| XXXXX | 0.46 | Steve Frey | 7.7 | WAS |
| XXXXX | 0.46 | Xavier Hernandez | 5.3 | HOU |
| XXXXX | 0.45 | Bill Landrum | 5 | PIT |
| XXXXX | 0.45 | Dan Schatzeder | 7.7 | HOU |
| XXXXX | 0.43 | Dennis Eckersley | 5 | OAK |
| XXXXX | 0.42 | Larry Andersen | 7.3 | HOU |
_