| Starter | Tm | Tier | Game |
|---|---|---|---|
| Orel Hershiser | LAN | 7.56 | 198906140_HOU_LAN |
| Mike Scott | HOU | 6.57 | 198906130_HOU_LAN |
| Mark Gubicza | KCA | 5.86 | 198906120_OAK_KCA |
| Dwight Gooden | NYN | 4.91 | 198906140_CHN_NYN |
| Bob Welch | OAK | 2.85 | 198906120_OAK_KCA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jerry Reuss | CHA | -3.33 | 198906140_CLE_CHA |
| Bill Swift | SEA | -2.49 | 198906140_SEA_MIN |
| Rich Yett | CLE | -1.75 | 198906120_CLE_CHA |
| Bob Knepper | HOU | -1.54 | 198906140_HOU_LAN |
| Mike Witt | ANA | -1.42 | 198906120_ANA_TEX |
Based on accumulated WAA for this season up to 1989-06-14.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 3.91 | Mike Moore | 94 | OAK |
| +005+ | 3.6 | Mike Morgan | 79.3 | LAN |
| +007+ | 3.49 | Rick Reuschel | 103.7 | SFN |
| +008+ | 3.44 | Mark Gubicza | 122.3 | KCA |
| +009+ | 3.3 | Ed Whitson | 97.3 | SDN |
| +012+ | 3.12 | Chuck Finley | 92 | ANA |
| +015+ | 2.86 | Orel Hershiser | 106 | LAN |
| +016+ | 2.82 | Bryn Smith | 84.3 | WAS |
| +018+ | 2.75 | Dwight Gooden | 99 | NYN |
| +019+ | 2.73 | John Smoltz | 96.3 | ATL |
| +020+ | 2.72 | Greg Swindell | 103.3 | CLE |
| +021+ | 2.7 | Kirk McCaskill | 89.7 | ANA |
| +024+ | 2.63 | Mike Scott | 105.3 | HOU |
| +025+ | 2.63 | Bert Blyleven | 86.3 | ANA |
| +028+ | 2.54 | Mike Bielecki | 73.3 | CHN |
| +030+ | 2.47 | Scott Garrelts | 89 | SFN |
| +040+ | 2.31 | Todd Burns | 48.7 | OAK |
| +041+ | 2.3 | Doug Drabek | 87.7 | PIT |
| +044+ | 2.22 | Dennis Martinez | 97 | WAS |
| +045+ | 2.21 | Chris Bosio | 97.7 | MIL |
| +048+ | 2.04 | Jose DeLeon | 107.3 | SLN |
| +050+ | 2.01 | Jeff Ballard | 75.3 | BAL |
| +054+ | 1.97 | Bob Welch | 93.3 | OAK |
| +060+ | 1.83 | John Cerutti | 82.3 | TOR |
| +062+ | 1.82 | Bret Saberhagen | 93.3 | KCA |
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