| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 2.79 | 198909300_KCA_OAK |
| Toronto Blue Jays | TOR | 2.59 | 198909300_BAL_TOR |
| Kansas City Royals | KCA | 1.25 | 198909300_KCA_OAK |
| California Angels | ANA | 1.23 | 198909280_KCA_ANA |
| San Diego Padres | SDN | 1.21 | 198909290_SFN_SDN |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Chicago White Sox | CHA | -3.08 | 198909290_CLE_CHA |
| San Francisco Giants | SFN | -2.75 | 198909300_SFN_SDN |
| Detroit Tigers | DET | -2.05 | 198909300_DET_NYA |
| Minnesota Twins | MIN | -0.76 | 198909290_MIN_SEA |
| Baltimore Orioles | BAL | -0.62 | 198909300_BAL_TOR |
Based on accumulated WAA for this season up to 1989-09-30.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +027+ | 4.93 | Jeff Montgomery | 91 | KCA |
| +038+ | 4.32 | Larry Andersen | 88.3 | HOU |
| +041+ | 4.13 | Les Lancaster | 72.7 | CHN |
| +050+ | 3.84 | Mark Davis | 91.3 | SDN |
| +053+ | 3.8 | Danny Darwin | 122 | HOU |
| +052+ | 3.8 | Gregg Olson | 85 | BAL |
| +054+ | 3.78 | Jay Howell | 79.3 | LAN |
| +055+ | 3.77 | Roger McDowell | 91.7 | TOT |
| +059+ | 3.66 | Bill Landrum | 81 | PIT |
| +060+ | 3.65 | Rob Dibble | 99.3 | CIN |
| +062+ | 3.64 | Tom Henke | 89.3 | TOR |
| +070+ | 3.4 | Jim Acker | 125.7 | TOT |
| +071+ | 3.38 | Lee Guetterman | 103.7 | NYA |
| +072+ | 3.33 | Todd Burns | 96.7 | OAK |
| +079+ | 3.08 | Dennis Lamp | 109.3 | BOS |
| +085+ | 2.99 | Dennis Eckersley | 56.3 | OAK |
| +089+ | 2.9 | Greg Minton | 89.7 | ANA |
| +092+ | 2.87 | Jesse Orosco | 77 | CLE |
| +093+ | 2.85 | Frank DiPino | 87 | SLN |
| +095+ | 2.79 | Greg Harris | 128 | SDN |
| +098+ | 2.67 | Randy Myers | 84.7 | NYN |
| +101+ | 2.62 | Bob McClure | 52.3 | ANA |
| +108+ | 2.54 | Jeff Russell | 72.3 | TEX |
| +109+ | 2.53 | Chuck Crim | 117.3 | MIL |
| +113+ | 2.46 | Rick Honeycutt | 77 | OAK |
_