| Starter | Tm | Tier | Game |
|---|---|---|---|
| Orel Hershiser | LAN | 7.46 | 198908030_SFN_LAN |
| John Smoltz | ATL | 4.63 | 198908030_SDN_ATL |
| 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 |
| Bobby Witt | TEX | -3.76 | 198908030_TEX_DET |
| Dave LaPoint | NYA | -2.89 | 198908021_MIN_NYA |
| Wes Gardner | BOS | -2.24 | 198908012_BAL_BOS |
Based on accumulated WAA for this season up to 1989-08-03.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 5.56 | Mike Moore | 160.3 | OAK |
| +005+ | 5.36 | Bert Blyleven | 163.3 | ANA |
| +006+ | 5.27 | Bryn Smith | 147.7 | WAS |
| +007+ | 5.1 | John Smoltz | 172.3 | ATL |
| +008+ | 5.05 | Orel Hershiser | 175 | LAN |
| +010+ | 4.79 | Chuck Finley | 154.3 | ANA |
| +011+ | 4.77 | Chris Bosio | 174 | MIL |
| +013+ | 4.53 | Rick Reuschel | 154 | SFN |
| +016+ | 4.48 | Mike Scott | 162.3 | HOU |
| +018+ | 4.46 | John Cerutti | 145.3 | TOR |
| +020+ | 4.32 | Mark Langston | 176.3 | TOT |
| +023+ | 4.09 | Scott Garrelts | 134.3 | SFN |
| +026+ | 3.97 | Bret Saberhagen | 159.7 | KCA |
| +029+ | 3.81 | Greg Swindell | 153.3 | CLE |
| +036+ | 3.32 | Ed Whitson | 155.3 | SDN |
| +037+ | 3.25 | Greg Maddux | 153 | CHN |
| +038+ | 3.22 | John Smiley | 158.3 | PIT |
| +039+ | 3.19 | Mike Morgan | 131 | LAN |
| +042+ | 3.08 | Kevin Brown | 154.3 | TEX |
| +043+ | 3.02 | Sid Fernandez | 133.7 | NYN |
| +044+ | 3.01 | Mike Bielecki | 133.3 | CHN |
| +046+ | 2.98 | Dennis Martinez | 165 | WAS |
| +056+ | 2.68 | Kirk McCaskill | 137.3 | ANA |
| +060+ | 2.6 | Bruce Hurst | 171.3 | SDN |
| +062+ | 2.58 | Chuck Cary | 59.3 | NYA |
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