| Starter | Tm | Tier | Game |
|---|---|---|---|
| Doug Drabek | PIT | 5.44 | 198907190_PIT_SDN |
| Bryn Smith | WAS | 5.13 | 198907190_ATL_WAS |
| Mike Scott | HOU | 4.77 | 198907210_PHI_HOU |
| Bret Saberhagen | KCA | 4.26 | 198907200_CLE_KCA |
| Mike Moore | OAK | 3.64 | 198907210_BAL_OAK |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Melido Perez | CHA | -3.65 | 198907210_CHA_BOS |
| Kevin Gross | WAS | -2 | 198907210_CIN_WAS |
| Dave Schmidt | BAL | -1.7 | 198907200_BAL_OAK |
| Dennis Rasmussen | SDN | -0.99 | 198907210_SLN_SDN |
| Paul Kilgus | CHN | -0.91 | 198907200_SFN_CHN |
Based on accumulated WAA for this season up to 1989-07-21.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 5.47 | John Smoltz | 149 | ATL |
| +003+ | 5.47 | Mike Moore | 145 | OAK |
| +006+ | 5.04 | Bryn Smith | 134.7 | WAS |
| +007+ | 4.87 | Bert Blyleven | 140.7 | ANA |
| +009+ | 4.66 | Orel Hershiser | 152.3 | LAN |
| +011+ | 4.43 | Rick Reuschel | 145 | SFN |
| +013+ | 4.27 | Greg Swindell | 149.7 | CLE |
| +014+ | 4.13 | Chuck Finley | 139.3 | ANA |
| +016+ | 4.03 | Mark Gubicza | 175.3 | KCA |
| +018+ | 3.97 | Ed Whitson | 146.3 | SDN |
| +021+ | 3.73 | Mike Scott | 147.3 | HOU |
| +022+ | 3.66 | Mike Morgan | 123 | LAN |
| +023+ | 3.63 | Bret Saberhagen | 144 | KCA |
| +027+ | 3.31 | Chris Bosio | 152 | MIL |
| +030+ | 3.3 | Scott Garrelts | 122 | SFN |
| +031+ | 3.28 | Mark Langston | 159.3 | TOT |
| +033+ | 3.08 | John Cerutti | 123.3 | TOR |
| +038+ | 3.02 | Scott Bankhead | 133.3 | SEA |
| +045+ | 2.8 | Mike Bielecki | 119.7 | CHN |
| +048+ | 2.76 | Doug Drabek | 141 | PIT |
| +050+ | 2.74 | Sid Fernandez | 117 | NYN |
| +056+ | 2.58 | John Smiley | 141.3 | PIT |
| +057+ | 2.49 | Todd Burns | 67.3 | OAK |
| +061+ | 2.46 | Kevin Brown | 138.3 | TEX |
| +063+ | 2.31 | Jose Rijo | 111.3 | CIN |
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