| Team | Tm | Tier | Game |
|---|---|---|---|
| New York Mets | NYN | 4.23 | 198905060_HOU_NYN |
| San Francisco Giants | SFN | 2.63 | 198905070_SLN_SFN |
| Oakland Athletics | OAK | 2.46 | 198905070_OAK_DET |
| Cincinnati Reds | CIN | 2.2 | 198905070_PHI_CIN |
| New York Yankees | NYA | 1.18 | 198905070_NYA_CHA |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Boston Red Sox | BOS | -2.92 | 198905060_TEX_BOS |
| Toronto Blue Jays | TOR | -2.8 | 198905060_ANA_TOR |
| Seattle Mariners | SEA | -2.52 | 198905061_SEA_BAL |
| Pittsburgh Pirates | PIT | -2.31 | 198905060_PIT_SDN |
| Baltimore Orioles | BAL | -2.09 | 198905070_SEA_BAL |
Based on accumulated WAA for this season up to 1989-05-07.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +023+ | 1.66 | Craig Lefferts | 22.3 | SFN |
| +033+ | 1.56 | Lee Guetterman | 17.7 | NYA |
| XXXXX | 1.24 | Jay Howell | 20 | LAN |
| XXXXX | 0.99 | Mark Davis | 21.3 | SDN |
| XXXXX | 0.98 | Jose Alvarez | 21 | ATL |
| XXXXX | 0.96 | Scott Garrelts | 41.7 | SFN |
| XXXXX | 0.95 | Dennis Eckersley | 13.3 | OAK |
| XXXXX | 0.94 | Dennis Powell | 18 | SEA |
| XXXXX | 0.91 | Mark Knudson | 20.3 | MIL |
| XXXXX | 0.87 | Mitch Williams | 17.3 | CHN |
| XXXXX | 0.82 | Greg Harris | 21 | PHI |
| XXXXX | 0.81 | Todd Burns | 19 | OAK |
| XXXXX | 0.8 | Frank DiPino | 16.7 | SLN |
| XXXXX | 0.8 | Greg Minton | 19.3 | ANA |
| XXXXX | 0.8 | Paul Assenmacher | 11.7 | ATL |
| XXXXX | 0.8 | Danny Darwin | 27.3 | HOU |
| XXXXX | 0.79 | Luis Aquino | 19.7 | KCA |
| XXXXX | 0.79 | Jeff Russell | 14.3 | TEX |
| XXXXX | 0.78 | Randy Myers | 14 | NYN |
| XXXXX | 0.78 | Gene Nelson | 9 | OAK |
| XXXXX | 0.77 | Rick Honeycutt | 21 | OAK |
| XXXXX | 0.75 | Pat Perry | 16 | CHN |
| XXXXX | 0.75 | Bryan Harvey | 11.3 | ANA |
| XXXXX | 0.74 | Rich Gossage | 11.3 | SFN |
| XXXXX | 0.73 | Norm Charlton | 13.7 | CIN |
_