| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 2.81 | 198909170_OAK_BOS |
| Toronto Blue Jays | TOR | 2.24 | 198909170_CLE_TOR |
| California Angels | ANA | 2.18 | 198909151_ANA_CHA |
| St. Louis Cardinals | SLN | 1.86 | 198909151_SLN_PHI |
| Boston Red Sox | BOS | 1.1 | 198909170_OAK_BOS |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Chicago White Sox | CHA | -7.07 | 198909160_ANA_CHA |
| Baltimore Orioles | BAL | -5.84 | 198909170_KCA_BAL |
| Minnesota Twins | MIN | -3.5 | 198909170_DET_MIN |
| Atlanta Braves | ATL | -1.99 | 198909150_ATL_LAN |
| Seattle Mariners | SEA | -0.95 | 198909150_SEA_NYA |
Based on accumulated WAA for this season up to 1989-09-17.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +024+ | 4.81 | Jeff Montgomery | 87 | KCA |
| +033+ | 4.42 | Jay Howell | 77 | LAN |
| +036+ | 4.14 | Bill Landrum | 76.7 | PIT |
| +044+ | 3.84 | Les Lancaster | 59.3 | CHN |
| +048+ | 3.74 | Larry Andersen | 81.3 | HOU |
| +058+ | 3.35 | Jim Acker | 117 | TOT |
| +060+ | 3.34 | Gregg Olson | 79.3 | BAL |
| +059+ | 3.34 | Todd Burns | 91.7 | OAK |
| +061+ | 3.28 | Danny Darwin | 115.7 | HOU |
| +062+ | 3.26 | Roger McDowell | 83.3 | TOT |
| +065+ | 3.16 | Randy Myers | 80.3 | NYN |
| +067+ | 3.09 | Tom Henke | 80 | TOR |
| +068+ | 3.09 | Mark Davis | 82 | SDN |
| +073+ | 3.01 | Lee Guetterman | 94.3 | NYA |
| +072+ | 3.01 | Rob Dibble | 91.3 | CIN |
| +082+ | 2.82 | Jesse Orosco | 71 | CLE |
| +084+ | 2.76 | Dennis Eckersley | 48.7 | OAK |
| +087+ | 2.65 | Dennis Lamp | 103.7 | BOS |
| +093+ | 2.49 | Dan Quisenberry | 75.3 | SLN |
| +095+ | 2.47 | Jeff Parrett | 100.3 | PHI |
| +099+ | 2.43 | Greg Minton | 83.7 | ANA |
| +100+ | 2.43 | Bob McClure | 47.3 | ANA |
| +098+ | 2.43 | Craig Lefferts | 104 | SFN |
| +102+ | 2.39 | Doug Jones | 73.3 | CLE |
| +103+ | 2.38 | Dan Plesac | 60.3 | MIL |
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