| Team | Tm | Tier | Game |
|---|---|---|---|
| New York Mets | NYN | 4.92 | 199004210_WAS_NYN |
| Kansas City Royals | KCA | 3.87 | 199004200_KCA_TOR |
| Oakland Athletics | OAK | 3.59 | 199004200_SEA_OAK |
| Cincinnati Reds | CIN | 2.45 | 199004210_ATL_CIN |
| Cleveland Indians | CLE | 1.41 | 199004210_CHA_CLE |
| Team | Tm | Tier | Game |
|---|---|---|---|
| San Francisco Giants | SFN | -3.67 | 199004200_SFN_SDN |
| California Angels | ANA | -3.57 | 199004210_ANA_MIN |
| Atlanta Braves | ATL | -3.28 | 199004210_ATL_CIN |
| Detroit Tigers | DET | -1.26 | 199004190_DET_BAL |
| Minnesota Twins | MIN | -0.63 | 199004200_ANA_MIN |
Based on accumulated WAA for this season up to 1990-04-21.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| XXXXX | 1 | Duane Ward | 11 | TOR |
| XXXXX | 0.88 | Paul Assenmacher | 12.3 | CHN |
| XXXXX | 0.82 | Terry Leach | 9 | MIN |
| XXXXX | 0.81 | Rob Dibble | 9.3 | CIN |
| XXXXX | 0.77 | Dan Petry | 13 | DET |
| XXXXX | 0.76 | Greg Harris | 13 | SDN |
| XXXXX | 0.73 | Cecilio Guante | 7.7 | CLE |
| XXXXX | 0.72 | Tim Crews | 8 | LAN |
| XXXXX | 0.67 | Dave Smith | 7.7 | HOU |
| XXXXX | 0.65 | Mitch Williams | 7.3 | CHN |
| XXXXX | 0.64 | Bill Landrum | 7 | PIT |
| XXXXX | 0.63 | Brian Holman | 21 | SEA |
| XXXXX | 0.58 | Ted Power | 6.3 | PIT |
| XXXXX | 0.57 | Greg Minton | 6.7 | ANA |
| XXXXX | 0.56 | Gene Nelson | 6.7 | OAK |
| XXXXX | 0.55 | Dan Schatzeder | 8.7 | HOU |
| XXXXX | 0.52 | Gregg Olson | 5.7 | BAL |
| XXXXX | 0.51 | Dennis Eckersley | 6 | OAK |
| XXXXX | 0.5 | Eric Plunk | 5.3 | NYA |
| XXXXX | 0.49 | Don Carman | 5.3 | PHI |
| XXXXX | 0.49 | Mark Eichhorn | 10.7 | ANA |
| XXXXX | 0.49 | Dave Wells | 7.7 | TOR |
| XXXXX | 0.49 | Mike Henneman | 7.7 | DET |
| XXXXX | 0.48 | Barry Jones | 5.3 | CHA |
| XXXXX | 0.48 | Ray Searage | 5.3 | LAN |
_