| Starter | Tm | Tier | Game |
|---|---|---|---|
| Mark Langston | WAS | 4.27 | 198907310_WAS_PIT |
| Mike Moore | OAK | 3.91 | 198907310_CHA_OAK |
| Mark Gubicza | KCA | 3.34 | 198908020_KCA_TOR |
| Bert Blyleven | ANA | 3.23 | 198908020_ANA_SEA |
| Scott Garrelts | SFN | 3.19 | 198908010_SFN_LAN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Storm Davis | OAK | -4.35 | 198908020_CHA_OAK |
| Melido Perez | CHA | -4.21 | 198908020_CHA_OAK |
| Dave LaPoint | NYA | -2.89 | 198908021_MIN_NYA |
| Wes Gardner | BOS | -2.24 | 198908012_BAL_BOS |
| Mike Dunne | SEA | -1.75 | 198908010_ANA_SEA |
Based on accumulated WAA for this season up to 1989-08-02.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 5.73 | John Smoltz | 165 | ATL |
| +004+ | 5.55 | Mike Moore | 160.3 | OAK |
| +006+ | 5.35 | Bert Blyleven | 163.3 | ANA |
| +007+ | 5.3 | Bryn Smith | 147.7 | WAS |
| +008+ | 5.07 | Orel Hershiser | 168 | LAN |
| +010+ | 4.78 | Chuck Finley | 154.3 | ANA |
| +011+ | 4.76 | Chris Bosio | 174 | MIL |
| +015+ | 4.51 | Rick Reuschel | 154 | SFN |
| +017+ | 4.46 | Mike Scott | 162.3 | HOU |
| +018+ | 4.45 | John Cerutti | 145.3 | TOR |
| +019+ | 4.33 | Mark Langston | 176.3 | TOT |
| +022+ | 4.07 | Scott Garrelts | 134.3 | SFN |
| +024+ | 3.96 | Bret Saberhagen | 159.7 | KCA |
| +028+ | 3.8 | Greg Swindell | 153.3 | CLE |
| +035+ | 3.31 | Ed Whitson | 155.3 | SDN |
| +036+ | 3.25 | John Smiley | 158.3 | PIT |
| +038+ | 3.18 | Mike Morgan | 131 | LAN |
| +041+ | 3.06 | Kevin Brown | 154.3 | TEX |
| +045+ | 3 | Mike Bielecki | 133.3 | CHN |
| +044+ | 3 | Sid Fernandez | 133.7 | NYN |
| +055+ | 2.69 | Greg Maddux | 146.7 | CHN |
| +057+ | 2.61 | Doug Drabek | 153.3 | PIT |
| +059+ | 2.59 | Bruce Hurst | 171.3 | SDN |
| +061+ | 2.51 | Todd Burns | 72.3 | OAK |
| +064+ | 2.43 | Tom Candiotti | 135.3 | CLE |
_