| Team | Tm | Tier | Game |
|---|---|---|---|
| Toronto Blue Jays | TOR | 5.85 | 198910010_BAL_TOR |
| Oakland Athletics | OAK | 3.09 | 198910010_KCA_OAK |
| California Angels | ANA | 1.33 | 198910010_TEX_ANA |
| Kansas City Royals | KCA | 1.25 | 198909300_KCA_OAK |
| San Diego Padres | SDN | 1.21 | 198909290_SFN_SDN |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Chicago White Sox | CHA | -3.08 | 198909290_CLE_CHA |
| Baltimore Orioles | BAL | -2.78 | 198910010_BAL_TOR |
| San Francisco Giants | SFN | -2.75 | 198909300_SFN_SDN |
| Detroit Tigers | DET | -2.28 | 198910010_DET_NYA |
| Atlanta Braves | ATL | -0.97 | 198910010_LAN_ATL |
Based on accumulated WAA for this season up to 1989-10-01.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +027+ | 4.91 | Jeff Montgomery | 91 | KCA |
| +037+ | 4.3 | Larry Andersen | 88.3 | HOU |
| +041+ | 4.12 | Les Lancaster | 72.7 | CHN |
| +045+ | 4 | Mark Davis | 93.3 | SDN |
| +049+ | 3.84 | Roger McDowell | 92.7 | TOT |
| +050+ | 3.84 | Jay Howell | 80.3 | LAN |
| +053+ | 3.79 | Gregg Olson | 85 | BAL |
| +054+ | 3.78 | Danny Darwin | 122 | HOU |
| +061+ | 3.65 | Bill Landrum | 81 | PIT |
| +062+ | 3.64 | Rob Dibble | 99.3 | CIN |
| +064+ | 3.63 | Tom Henke | 89.3 | TOR |
| +072+ | 3.37 | Greg Harris | 135 | SDN |
| +073+ | 3.37 | Jim Acker | 125.7 | TOT |
| +074+ | 3.36 | Lee Guetterman | 103.7 | NYA |
| +076+ | 3.32 | Dennis Lamp | 112.3 | BOS |
| +077+ | 3.3 | Todd Burns | 96.7 | OAK |
| +084+ | 3.06 | Dennis Eckersley | 57.3 | OAK |
| +085+ | 3.03 | John Cerutti | 205.3 | TOR |
| +088+ | 2.96 | Frank DiPino | 88.3 | SLN |
| +089+ | 2.94 | Jesse Orosco | 78 | CLE |
| +091+ | 2.91 | Greg Minton | 90 | ANA |
| +098+ | 2.66 | Randy Myers | 84.7 | NYN |
| +103+ | 2.61 | Bob McClure | 52.3 | ANA |
| +105+ | 2.56 | Jeff Russell | 72.7 | TEX |
| +108+ | 2.54 | Doug Jones | 80.7 | CLE |
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