| Team | Tm | Tier | Game |
|---|---|---|---|
| New York Mets | NYN | 3.19 | 198904300_NYN_HOU |
| Montreal Expos | WAS | 2.47 | 198904280_ATL_WAS |
| Detroit Tigers | DET | 2.07 | 198904290_DET_OAK |
| Cincinnati Reds | CIN | 1.74 | 198904300_CIN_PHI |
| Oakland Athletics | OAK | 1.37 | 198904290_DET_OAK |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Seattle Mariners | SEA | -5.15 | 198904280_BAL_SEA |
| Boston Red Sox | BOS | -2.65 | 198904290_BOS_TEX |
| Minnesota Twins | MIN | -2.22 | 198904280_CLE_MIN |
| Pittsburgh Pirates | PIT | -1.91 | 198904280_SFN_PIT |
| Chicago White Sox | CHA | -1.32 | 198904280_CHA_NYA |
Based on accumulated WAA for this season up to 1989-04-30.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +030+ | 1.29 | Lee Guetterman | 14.7 | NYA |
| +031+ | 1.28 | Craig Lefferts | 17.7 | SFN |
| XXXXX | 0.98 | Dennis Eckersley | 11.3 | OAK |
| XXXXX | 0.97 | Danny Darwin | 24.3 | HOU |
| XXXXX | 0.9 | Jay Howell | 16 | LAN |
| XXXXX | 0.87 | Larry McWilliams | 19.3 | PHI |
| XXXXX | 0.85 | Terry Leach | 12.3 | NYN |
| XXXXX | 0.8 | Cris Carpenter | 17 | SLN |
| XXXXX | 0.74 | Bryan Harvey | 8.7 | ANA |
| XXXXX | 0.73 | Greg Minton | 16 | ANA |
| XXXXX | 0.72 | Jose Alvarez | 18 | ATL |
| XXXXX | 0.71 | Tim Crews | 13.7 | LAN |
| XXXXX | 0.71 | Mark Davis | 18 | SDN |
| XXXXX | 0.71 | Frank DiPino | 11 | SLN |
| XXXXX | 0.69 | Bobby Thigpen | 10.7 | CHA |
| XXXXX | 0.64 | Randy Myers | 12.3 | NYN |
| XXXXX | 0.63 | Paul Assenmacher | 9.7 | ATL |
| XXXXX | 0.63 | Dennis Powell | 12 | SEA |
| XXXXX | 0.63 | Jeff Parrett | 16.7 | PHI |
| XXXXX | 0.62 | Todd Burns | 17 | OAK |
| XXXXX | 0.61 | Jeff Russell | 12.3 | TEX |
| XXXXX | 0.6 | Rich Gossage | 9.7 | SFN |
| XXXXX | 0.59 | Roger McDowell | 9.3 | NYN |
| XXXXX | 0.59 | Cecilio Guante | 14.7 | TEX |
| XXXXX | 0.55 | Gene Nelson | 6.3 | OAK |
_