| Team | Tm | Tier | Game |
|---|---|---|---|
| Montreal Expos | WAS | 2.51 | 198904260_WAS_CIN |
| New York Mets | NYN | 2.23 | 198904260_ATL_NYN |
| Detroit Tigers | DET | 1.66 | 198904270_DET_ANA |
| Cincinnati Reds | CIN | 1.33 | 198904260_WAS_CIN |
| Houston Astros | HOU | 1.21 | 198904280_NYN_HOU |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Seattle Mariners | SEA | -5.15 | 198904280_BAL_SEA |
| Boston Red Sox | BOS | -3.09 | 198904260_CHA_BOS |
| Minnesota Twins | MIN | -2.22 | 198904280_CLE_MIN |
| Chicago White Sox | CHA | -2 | 198904260_CHA_BOS |
| Pittsburgh Pirates | PIT | -1.91 | 198904280_SFN_PIT |
Based on accumulated WAA for this season up to 1989-04-28.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +016+ | 1.45 | Mike Morgan | 25 | LAN |
| +028+ | 1.29 | Lee Guetterman | 14.7 | NYA |
| +029+ | 1.28 | Craig Lefferts | 17.7 | SFN |
| +030+ | 1.28 | Larry Andersen | 15.3 | HOU |
| XXXXX | 0.98 | Dennis Eckersley | 11.3 | OAK |
| XXXXX | 0.97 | Todd Burns | 16 | OAK |
| XXXXX | 0.89 | Larry McWilliams | 17.3 | PHI |
| XXXXX | 0.87 | Mark Davis | 15 | SDN |
| XXXXX | 0.86 | Atlee Hammaker | 17.7 | SFN |
| XXXXX | 0.81 | Danny Darwin | 22.3 | HOU |
| XXXXX | 0.75 | Jay Howell | 14 | LAN |
| XXXXX | 0.75 | Bryan Harvey | 8.7 | ANA |
| XXXXX | 0.74 | Cris Carpenter | 16 | SLN |
| XXXXX | 0.71 | Mark Knudson | 13 | MIL |
| XXXXX | 0.69 | Jeff Russell | 10.7 | TEX |
| XXXXX | 0.69 | Bobby Thigpen | 10.7 | CHA |
| XXXXX | 0.64 | Dennis Powell | 12 | SEA |
| XXXXX | 0.63 | Jose Alvarez | 17 | ATL |
| XXXXX | 0.62 | Jeff Parrett | 16.7 | PHI |
| XXXXX | 0.61 | Tim Crews | 12.3 | LAN |
| XXXXX | 0.6 | Cecilio Guante | 14.7 | TEX |
| XXXXX | 0.59 | Greg Minton | 14 | ANA |
| XXXXX | 0.59 | Roger McDowell | 9.3 | NYN |
| XXXXX | 0.58 | Brian Holman | 9 | WAS |
| XXXXX | 0.56 | Frank DiPino | 9 | SLN |
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