| Starter | Tm | Tier | Game |
|---|---|---|---|
| Orel Hershiser | LAN | 8.14 | 198907231_LAN_PIT |
| Rick Reuschel | SFN | 6.61 | 198907240_SFN_ATL |
| Bryn Smith | WAS | 5.25 | 198907240_PHI_WAS |
| Mark Gubicza | KCA | 5.03 | 198907230_CLE_KCA |
| John Smoltz | ATL | 3.97 | 198907240_SFN_ATL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bobby Witt | TEX | -3.36 | 198907230_NYA_TEX |
| Storm Davis | OAK | -2.7 | 198907230_BAL_OAK |
| Jerry Reuss | CHA | -2.49 | 198907240_SEA_CHA |
| Bruce Ruffin | PHI | -2.33 | 198907230_PHI_HOU |
| Dave LaPoint | NYA | -2.09 | 198907220_NYA_TEX |
Based on accumulated WAA for this season up to 1989-07-24.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 5.84 | John Smoltz | 158 | ATL |
| +003+ | 5.45 | Mike Moore | 145 | OAK |
| +004+ | 5.38 | Bryn Smith | 141.7 | WAS |
| +007+ | 4.88 | Rick Reuschel | 150 | SFN |
| +008+ | 4.73 | Bert Blyleven | 147.7 | ANA |
| +009+ | 4.69 | Orel Hershiser | 160 | LAN |
| +013+ | 4.25 | Greg Swindell | 149.7 | CLE |
| +015+ | 4.02 | Chuck Finley | 139.3 | ANA |
| +016+ | 3.96 | Ed Whitson | 146.3 | SDN |
| +018+ | 3.92 | Chris Bosio | 159 | MIL |
| +020+ | 3.73 | Mike Scott | 147.3 | HOU |
| +021+ | 3.62 | Bret Saberhagen | 144 | KCA |
| +024+ | 3.4 | John Cerutti | 129.3 | TOR |
| +027+ | 3.32 | Scott Garrelts | 122 | SFN |
| +033+ | 3.24 | Mark Langston | 159.3 | TOT |
| +035+ | 3.19 | Mike Bielecki | 126.7 | CHN |
| +036+ | 3.16 | Mark Gubicza | 180 | KCA |
| +039+ | 3.01 | Scott Bankhead | 133.3 | SEA |
| +041+ | 2.98 | Mike Morgan | 127.3 | LAN |
| +044+ | 2.93 | Sid Fernandez | 121.7 | NYN |
| +050+ | 2.74 | Doug Drabek | 141 | PIT |
| +054+ | 2.63 | Todd Burns | 69 | OAK |
| +059+ | 2.56 | John Smiley | 141.3 | PIT |
| +060+ | 2.51 | Jim Deshaies | 140.3 | HOU |
| +063+ | 2.43 | Kevin Brown | 138.3 | TEX |
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