| Starter | Tm | Tier | Game |
|---|---|---|---|
| Mike Scott | HOU | 4.77 | 198907210_PHI_HOU |
| Bret Saberhagen | KCA | 4.26 | 198907200_CLE_KCA |
| Mike Moore | OAK | 3.64 | 198907210_BAL_OAK |
| Greg Swindell | CLE | 3.04 | 198907200_CLE_KCA |
| Mark Langston | WAS | 2.69 | 198907200_CIN_WAS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Melido Perez | CHA | -3.65 | 198907210_CHA_BOS |
| Dave LaPoint | NYA | -2.09 | 198907220_NYA_TEX |
| Ted Power | SLN | -2.07 | 198907220_SLN_SDN |
| Kevin Gross | WAS | -2 | 198907210_CIN_WAS |
| Dave Schmidt | BAL | -1.7 | 198907200_BAL_OAK |
Based on accumulated WAA for this season up to 1989-07-22.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 5.46 | John Smoltz | 149 | ATL |
| +003+ | 5.44 | Mike Moore | 145 | OAK |
| +005+ | 5.02 | Bryn Smith | 134.7 | WAS |
| +007+ | 4.75 | Bert Blyleven | 140.7 | ANA |
| +009+ | 4.65 | Orel Hershiser | 152.3 | LAN |
| +012+ | 4.42 | Rick Reuschel | 145 | SFN |
| +013+ | 4.25 | Greg Swindell | 149.7 | CLE |
| +015+ | 4.01 | Chuck Finley | 139.3 | ANA |
| +016+ | 4 | Mark Gubicza | 175.3 | KCA |
| +017+ | 3.95 | Ed Whitson | 146.3 | SDN |
| +020+ | 3.72 | Mike Scott | 147.3 | HOU |
| +022+ | 3.64 | Mike Morgan | 123 | LAN |
| +023+ | 3.61 | Bret Saberhagen | 144 | KCA |
| +025+ | 3.37 | John Cerutti | 129.3 | TOR |
| +030+ | 3.3 | Scott Garrelts | 122 | SFN |
| +031+ | 3.29 | Chris Bosio | 152 | MIL |
| +033+ | 3.25 | Mark Langston | 159.3 | TOT |
| +035+ | 3 | Scott Bankhead | 133.3 | SEA |
| +042+ | 2.92 | Sid Fernandez | 121.7 | NYN |
| +047+ | 2.78 | Mike Bielecki | 119.7 | CHN |
| +049+ | 2.74 | Doug Drabek | 141 | PIT |
| +055+ | 2.56 | John Smiley | 141.3 | PIT |
| +057+ | 2.5 | Jim Deshaies | 140.3 | HOU |
| +058+ | 2.48 | Todd Burns | 67.3 | OAK |
| +062+ | 2.44 | Kevin Brown | 138.3 | TEX |
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