| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bryn Smith | WAS | 5.75 | 198907300_SLN_WAS |
| Mike Scott | HOU | 5.37 | 198907300_SFN_HOU |
| Mike Moore | OAK | 3.91 | 198907310_CHA_OAK |
| Scott Garrelts | SFN | 3.19 | 198908010_SFN_LAN |
| Chuck Finley | ANA | 3.14 | 198907300_CHA_ANA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jerry Reuss | CHA | -2.37 | 198907300_CHA_ANA |
| Wes Gardner | BOS | -2.24 | 198908012_BAL_BOS |
| Don August | MIL | -2.15 | 198907300_MIL_TEX |
| Mike Dunne | SEA | -1.75 | 198908010_ANA_SEA |
| Don Carman | PHI | -1.3 | 198907312_CHN_PHI |
Based on accumulated WAA for this season up to 1989-08-01.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 5.72 | John Smoltz | 165 | ATL |
| +004+ | 5.54 | Mike Moore | 160.3 | OAK |
| +006+ | 5.29 | Bryn Smith | 147.7 | WAS |
| +007+ | 5.07 | Orel Hershiser | 168 | LAN |
| +009+ | 4.77 | Chuck Finley | 154.3 | ANA |
| +012+ | 4.56 | Bert Blyleven | 154.3 | ANA |
| +014+ | 4.49 | Rick Reuschel | 154 | SFN |
| +015+ | 4.44 | Mike Scott | 162.3 | HOU |
| +018+ | 4.33 | Mark Langston | 176.3 | TOT |
| +019+ | 4.17 | Chris Bosio | 165 | MIL |
| +020+ | 4.05 | Scott Garrelts | 134.3 | SFN |
| +023+ | 3.94 | Bret Saberhagen | 159.7 | KCA |
| +027+ | 3.8 | Greg Swindell | 153.3 | CLE |
| +028+ | 3.66 | John Cerutti | 136.3 | TOR |
| +035+ | 3.31 | Ed Whitson | 155.3 | SDN |
| +036+ | 3.25 | John Smiley | 158.3 | PIT |
| +037+ | 3.24 | Mike Morgan | 129.3 | LAN |
| +038+ | 3.22 | Mark Gubicza | 187.7 | KCA |
| +044+ | 3.04 | Kevin Brown | 154.3 | TEX |
| +045+ | 3 | Sid Fernandez | 133.7 | NYN |
| +046+ | 2.99 | Mike Bielecki | 133.3 | CHN |
| +056+ | 2.7 | Bruce Hurst | 165.3 | SDN |
| +058+ | 2.68 | Greg Maddux | 146.7 | CHN |
| +059+ | 2.61 | Doug Drabek | 153.3 | PIT |
| +061+ | 2.51 | Todd Burns | 72.3 | OAK |
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