| Team | Tm | Tier | Game |
|---|---|---|---|
| Los Angeles Dodgers | LAN | 6.43 | 198909050_LAN_HOU |
| Oakland Athletics | OAK | 2.82 | 198909040_BOS_OAK |
| Toronto Blue Jays | TOR | 2.64 | 198909040_TOR_CHA |
| San Diego Padres | SDN | 1.83 | 198909040_SDN_ATL |
| St. Louis Cardinals | SLN | 1.82 | 198909060_SLN_NYN |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Minnesota Twins | MIN | -5.12 | 198909040_MIN_TEX |
| Chicago White Sox | CHA | -2.27 | 198909050_TOR_CHA |
| Baltimore Orioles | BAL | -2 | 198909040_CLE_BAL |
| Atlanta Braves | ATL | -1.57 | 198909050_SDN_ATL |
| Detroit Tigers | DET | -1.45 | 198909040_KCA_DET |
Based on accumulated WAA for this season up to 1989-09-06.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +020+ | 4.94 | Jay Howell | 73 | LAN |
| +027+ | 4.48 | Jeff Montgomery | 83 | KCA |
| +032+ | 4.37 | Bill Landrum | 71.3 | PIT |
| +041+ | 3.8 | Jeff Parrett | 95.7 | PHI |
| +050+ | 3.57 | Mike Morgan | 148.3 | LAN |
| +052+ | 3.54 | Larry Andersen | 79 | HOU |
| +058+ | 3.29 | Danny Darwin | 110.7 | HOU |
| +060+ | 3.23 | Les Lancaster | 49.7 | CHN |
| +069+ | 3.05 | Roger McDowell | 75.7 | TOT |
| +070+ | 3.03 | Rob Dibble | 86.3 | CIN |
| +071+ | 2.88 | Tom Henke | 74.3 | TOR |
| +072+ | 2.87 | Dennis Eckersley | 45 | OAK |
| +073+ | 2.87 | Gregg Olson | 73.7 | BAL |
| +075+ | 2.84 | Todd Burns | 85.7 | OAK |
| +076+ | 2.81 | Jim Acker | 105.7 | TOT |
| +078+ | 2.79 | Randy Myers | 75.7 | NYN |
| +080+ | 2.76 | Lee Guetterman | 91.3 | NYA |
| +084+ | 2.7 | Mark Davis | 77.3 | SDN |
| +091+ | 2.53 | Jeff Russell | 64.7 | TEX |
| +094+ | 2.45 | Mike Schooler | 66.3 | SEA |
| +096+ | 2.42 | Jesse Orosco | 63.3 | CLE |
| +097+ | 2.41 | Craig Lefferts | 95.7 | SFN |
| +101+ | 2.35 | Mitch Williams | 76 | CHN |
| +109+ | 2.26 | Dan Quisenberry | 69.7 | SLN |
| +113+ | 2.23 | Tim Burke | 78 | WAS |
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