| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rick Reuschel | SFN | 7.23 | 198906110_SDN_SFN |
| Mike Scott | HOU | 6.57 | 198906130_HOU_LAN |
| Mark Gubicza | KCA | 5.86 | 198906120_OAK_KCA |
| Bob Welch | OAK | 2.85 | 198906120_OAK_KCA |
| Greg Swindell | CLE | 2.09 | 198906130_CLE_CHA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Melido Perez | CHA | -2.85 | 198906110_CHA_MIN |
| Andy Hawkins | NYA | -2.8 | 198906111_BOS_NYA |
| Mike Smithson | BOS | -2.79 | 198906112_BOS_NYA |
| Rich Yett | CLE | -1.75 | 198906120_CLE_CHA |
| Mike Witt | ANA | -1.42 | 198906120_ANA_TEX |
Based on accumulated WAA for this season up to 1989-06-13.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 3.93 | Mike Moore | 94 | OAK |
| +006+ | 3.61 | Chuck Finley | 85.7 | ANA |
| +005+ | 3.61 | Mike Morgan | 79.3 | LAN |
| +007+ | 3.51 | Rick Reuschel | 103.7 | SFN |
| +008+ | 3.45 | Mark Gubicza | 122.3 | KCA |
| +010+ | 3.32 | Ed Whitson | 97.3 | SDN |
| +016+ | 2.82 | Bryn Smith | 84.3 | WAS |
| +017+ | 2.81 | Kirk McCaskill | 83.7 | ANA |
| +019+ | 2.73 | Greg Swindell | 103.3 | CLE |
| +020+ | 2.73 | John Smoltz | 96.3 | ATL |
| +023+ | 2.62 | Mike Scott | 105.3 | HOU |
| +024+ | 2.62 | Bert Blyleven | 86.3 | ANA |
| +028+ | 2.52 | Mike Bielecki | 73.3 | CHN |
| +030+ | 2.48 | Scott Garrelts | 89 | SFN |
| +035+ | 2.32 | Todd Burns | 48.7 | OAK |
| +036+ | 2.32 | Doug Drabek | 87.7 | PIT |
| +039+ | 2.23 | Chris Bosio | 97.7 | MIL |
| +040+ | 2.23 | Dwight Gooden | 93 | NYN |
| +041+ | 2.22 | Dennis Martinez | 97 | WAS |
| +045+ | 2.13 | Orel Hershiser | 97 | LAN |
| +046+ | 2.12 | Jose Rijo | 81.3 | CIN |
| +049+ | 2.06 | Jose DeLeon | 107.3 | SLN |
| +052+ | 2.02 | Jeff Ballard | 75.3 | BAL |
| +055+ | 1.98 | Bob Welch | 93.3 | OAK |
| +060+ | 1.85 | John Cerutti | 82.3 | TOR |
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