| Team | Tm | Tier | Game |
|---|---|---|---|
| Montreal Expos | WAS | 2.47 | 198904280_ATL_WAS |
| Detroit Tigers | DET | 2.07 | 198904290_DET_OAK |
| Cincinnati Reds | CIN | 1.59 | 198904290_CIN_PHI |
| Oakland Athletics | OAK | 1.37 | 198904290_DET_OAK |
| Houston Astros | HOU | 1.21 | 198904280_NYN_HOU |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Seattle Mariners | SEA | -5.15 | 198904280_BAL_SEA |
| Boston Red Sox | BOS | -2.67 | 198904270_CHA_BOS |
| Minnesota Twins | MIN | -2.22 | 198904280_CLE_MIN |
| Pittsburgh Pirates | PIT | -1.91 | 198904280_SFN_PIT |
| Chicago White Sox | CHA | -1.56 | 198904270_CHA_BOS |
Based on accumulated WAA for this season up to 1989-04-29.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +019+ | 1.43 | Mike Morgan | 25 | LAN |
| +030+ | 1.28 | Larry Andersen | 15.3 | HOU |
| +028+ | 1.28 | Lee Guetterman | 14.7 | NYA |
| +029+ | 1.28 | Craig Lefferts | 17.7 | SFN |
| XXXXX | 0.98 | Dennis Eckersley | 11.3 | OAK |
| XXXXX | 0.98 | Danny Darwin | 24.3 | HOU |
| XXXXX | 0.97 | Todd Burns | 16 | OAK |
| XXXXX | 0.91 | Larry McWilliams | 17.3 | PHI |
| XXXXX | 0.9 | Jay Howell | 16 | LAN |
| XXXXX | 0.86 | Atlee Hammaker | 17.7 | SFN |
| XXXXX | 0.86 | Todd Worrell | 12.7 | SLN |
| XXXXX | 0.81 | Cris Carpenter | 17 | SLN |
| XXXXX | 0.75 | Bryan Harvey | 8.7 | ANA |
| XXXXX | 0.75 | Greg Minton | 16 | ANA |
| XXXXX | 0.71 | Mark Davis | 18 | SDN |
| XXXXX | 0.7 | Mark Knudson | 13 | MIL |
| XXXXX | 0.69 | Bobby Thigpen | 10.7 | CHA |
| XXXXX | 0.67 | Rich Gossage | 8 | SFN |
| XXXXX | 0.64 | Dennis Powell | 12 | SEA |
| XXXXX | 0.64 | Jeff Parrett | 16.7 | PHI |
| XXXXX | 0.64 | Randy Myers | 12.3 | NYN |
| XXXXX | 0.64 | Jose Alvarez | 17 | ATL |
| XXXXX | 0.63 | Paul Assenmacher | 9.7 | ATL |
| XXXXX | 0.63 | Tim Crews | 12.7 | LAN |
| XXXXX | 0.6 | Cecilio Guante | 14.7 | TEX |
_