| Starter | Tm | Tier | Game |
|---|---|---|---|
| Orel Hershiser | LAN | 7.56 | 198906140_HOU_LAN |
| Mike Scott | HOU | 6.57 | 198906130_HOU_LAN |
| Dwight Gooden | NYN | 4.91 | 198906140_CHN_NYN |
| Dennis Martinez | WAS | 4.48 | 198906150_WAS_SLN |
| Doug Drabek | PIT | 3.53 | 198906150_PHI_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jerry Reuss | CHA | -3.33 | 198906140_CLE_CHA |
| Bill Swift | SEA | -2.49 | 198906140_SEA_MIN |
| Rich Dotson | NYA | -1.69 | 198906150_NYA_BAL |
| Bob Knepper | HOU | -1.54 | 198906140_HOU_LAN |
| Mike Boddicker | BOS | -0.95 | 198906140_DET_BOS |
Based on accumulated WAA for this season up to 1989-06-15.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 3.9 | Mike Moore | 94 | OAK |
| +006+ | 3.57 | Mike Morgan | 79.3 | LAN |
| +007+ | 3.48 | Rick Reuschel | 103.7 | SFN |
| +008+ | 3.42 | Mark Gubicza | 122.3 | KCA |
| +010+ | 3.27 | John Smoltz | 105.3 | ATL |
| +011+ | 3.25 | Ed Whitson | 97.3 | SDN |
| +014+ | 3.1 | Chuck Finley | 92 | ANA |
| +016+ | 2.82 | Orel Hershiser | 106 | LAN |
| +018+ | 2.8 | Bryn Smith | 84.3 | WAS |
| +019+ | 2.7 | Greg Swindell | 103.3 | CLE |
| +020+ | 2.69 | Dwight Gooden | 99 | NYN |
| +021+ | 2.69 | Kirk McCaskill | 89.7 | ANA |
| +023+ | 2.65 | Scott Garrelts | 96.3 | SFN |
| +026+ | 2.61 | Bert Blyleven | 86.3 | ANA |
| +027+ | 2.59 | Mike Scott | 105.3 | HOU |
| +030+ | 2.5 | Mike Bielecki | 73.3 | CHN |
| +036+ | 2.38 | Dennis Martinez | 104 | WAS |
| +041+ | 2.3 | Todd Burns | 48.7 | OAK |
| +042+ | 2.25 | Doug Drabek | 94.7 | PIT |
| +045+ | 2.21 | Jeff Ballard | 83 | BAL |
| +046+ | 2.19 | Chris Bosio | 97.7 | MIL |
| +053+ | 2.01 | Jose DeLeon | 107.3 | SLN |
| +055+ | 1.98 | Bret Saberhagen | 100.3 | KCA |
| +057+ | 1.95 | Bob Welch | 93.3 | OAK |
| +062+ | 1.83 | John Cerutti | 82.3 | TOR |
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