| Team | Tm | Tier | Game |
|---|---|---|---|
| Los Angeles Dodgers | LAN | 5.04 | 198909140_HOU_LAN |
| Toronto Blue Jays | TOR | 2.5 | 198909130_TOR_MIN |
| Oakland Athletics | OAK | 2.4 | 198909130_MIL_OAK |
| St. Louis Cardinals | SLN | 2.25 | 198909140_PIT_SLN |
| California Angels | ANA | 2.18 | 198909151_ANA_CHA |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Baltimore Orioles | BAL | -4.74 | 198909130_CHA_BAL |
| Chicago White Sox | CHA | -2.81 | 198909151_ANA_CHA |
| Atlanta Braves | ATL | -2.11 | 198909140_ATL_SDN |
| Seattle Mariners | SEA | -1.14 | 198909130_BOS_SEA |
| Detroit Tigers | DET | -0.88 | 198909150_DET_MIN |
Based on accumulated WAA for this season up to 1989-09-15.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +024+ | 4.74 | Jeff Montgomery | 86 | KCA |
| +026+ | 4.7 | Jay Howell | 75 | LAN |
| +031+ | 4.49 | Bill Landrum | 75.7 | PIT |
| +045+ | 3.75 | Larry Andersen | 81.3 | HOU |
| +048+ | 3.67 | Les Lancaster | 57.3 | CHN |
| +060+ | 3.3 | Danny Darwin | 115.7 | HOU |
| +061+ | 3.28 | Roger McDowell | 83.3 | TOT |
| +063+ | 3.21 | Gregg Olson | 77.7 | BAL |
| +064+ | 3.18 | Todd Burns | 89.7 | OAK |
| +065+ | 3.12 | Tom Henke | 80 | TOR |
| +066+ | 3.12 | Jim Acker | 114 | TOT |
| +067+ | 3.08 | Randy Myers | 79.3 | NYN |
| +072+ | 3.04 | Mark Davis | 81.3 | SDN |
| +074+ | 3.02 | Rob Dibble | 91.3 | CIN |
| +077+ | 2.92 | Lee Guetterman | 93.3 | NYA |
| +085+ | 2.67 | Dennis Eckersley | 47.7 | OAK |
| +086+ | 2.63 | Jesse Orosco | 68.7 | CLE |
| +087+ | 2.62 | Dennis Lamp | 100.7 | BOS |
| +092+ | 2.51 | Jeff Parrett | 100.3 | PHI |
| +093+ | 2.47 | Bob McClure | 45.3 | ANA |
| +094+ | 2.46 | Jeff Russell | 66.3 | TEX |
| +096+ | 2.44 | Greg Harris | 115.7 | SDN |
| +097+ | 2.43 | Dan Quisenberry | 74.3 | SLN |
| +098+ | 2.41 | Greg Minton | 83.3 | ANA |
| +103+ | 2.37 | Craig Lefferts | 103 | SFN |
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