| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 2.85 | 198905190_BOS_OAK |
| St. Louis Cardinals | SLN | 2.83 | 198905190_SLN_ATL |
| Cincinnati Reds | CIN | 2.44 | 198905190_CHN_CIN |
| Houston Astros | HOU | 1.85 | 198905190_PIT_HOU |
| Montreal Expos | WAS | 1.65 | 198905200_LAN_WAS |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Chicago White Sox | CHA | -2.81 | 198905200_TOR_CHA |
| Toronto Blue Jays | TOR | -2.42 | 198905190_TOR_CHA |
| Boston Red Sox | BOS | -2.32 | 198905200_BOS_OAK |
| Cleveland Indians | CLE | -2.01 | 198905180_CLE_BAL |
| Baltimore Orioles | BAL | -1.71 | 198905190_CLE_BAL |
Based on accumulated WAA for this season up to 1989-05-20.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +007+ | 2.62 | Lee Guetterman | 29.7 | NYA |
| +035+ | 1.73 | Larry Andersen | 21 | HOU |
| +043+ | 1.61 | Jose Alvarez | 28.3 | ATL |
| +046+ | 1.51 | Jay Howell | 23 | LAN |
| +045+ | 1.51 | Randy Myers | 23 | NYN |
| +053+ | 1.43 | Craig Lefferts | 29.7 | SFN |
| +055+ | 1.39 | Greg Minton | 26.3 | ANA |
| +056+ | 1.38 | Rick Aguilera | 24 | NYN |
| +061+ | 1.33 | Greg Harris | 20.7 | SDN |
| +065+ | 1.32 | Pat Perry | 22.7 | CHN |
| +066+ | 1.31 | Danny Darwin | 36.3 | HOU |
| XXXXX | 1.24 | Norm Charlton | 19.7 | CIN |
| XXXXX | 1.23 | Jeff Russell | 19.3 | TEX |
| XXXXX | 1.13 | Todd Burns | 25.3 | OAK |
| XXXXX | 1.13 | Jeff Pico | 25.3 | CHN |
| XXXXX | 0.94 | Paul Assenmacher | 15.7 | ATL |
| XXXXX | 0.89 | Don Aase | 15.7 | NYN |
| XXXXX | 0.89 | Kenny Rogers | 20.3 | TEX |
| XXXXX | 0.88 | John Franco | 20.3 | CIN |
| XXXXX | 0.88 | Mark Davis | 27.7 | SDN |
| XXXXX | 0.86 | Frank DiPino | 22.7 | SLN |
| XXXXX | 0.86 | Dennis Eckersley | 17.3 | OAK |
| XXXXX | 0.85 | Rich Gossage | 12.7 | SFN |
| XXXXX | 0.85 | Cecilio Guante | 22.3 | TEX |
| XXXXX | 0.79 | Bobby Thigpen | 19 | CHA |
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