| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rick Reuschel | SFN | 7.72 | 198906160_CIN_SFN |
| Mark Gubicza | KCA | 6.96 | 198906170_KCA_CLE |
| Roger Clemens | BOS | 6.36 | 198906160_BOS_CHA |
| Dennis Martinez | WAS | 4.48 | 198906150_WAS_SLN |
| Doug Drabek | PIT | 3.53 | 198906150_PHI_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bobby Witt | TEX | -4.1 | 198906161_TEX_NYA |
| Melido Perez | CHA | -3.58 | 198906170_BOS_CHA |
| Mike Smithson | BOS | -2.6 | 198906170_BOS_CHA |
| Andy Hawkins | NYA | -2.22 | 198906161_TEX_NYA |
| Storm Davis | OAK | -1.47 | 198906161_OAK_BAL |
Based on accumulated WAA for this season up to 1989-06-17.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 4.02 | Mike Morgan | 87.3 | LAN |
| +005+ | 3.72 | Rick Reuschel | 111.7 | SFN |
| +006+ | 3.47 | Mike Moore | 101 | OAK |
| +008+ | 3.27 | Mark Gubicza | 130.3 | KCA |
| +009+ | 3.26 | John Smoltz | 105.3 | ATL |
| +010+ | 3.2 | Ed Whitson | 104.3 | SDN |
| +014+ | 3.09 | Chuck Finley | 92 | ANA |
| +016+ | 2.84 | Bryn Smith | 92.3 | WAS |
| +018+ | 2.82 | Orel Hershiser | 106 | LAN |
| +024+ | 2.69 | Dwight Gooden | 99 | NYN |
| +023+ | 2.69 | Greg Swindell | 103.3 | CLE |
| +025+ | 2.68 | Kirk McCaskill | 89.7 | ANA |
| +026+ | 2.64 | Scott Garrelts | 96.3 | SFN |
| +027+ | 2.63 | Bert Blyleven | 94 | ANA |
| +029+ | 2.61 | Mike Scott | 105.3 | HOU |
| +033+ | 2.5 | Mike Bielecki | 73.3 | CHN |
| +039+ | 2.37 | Dennis Martinez | 104 | WAS |
| +042+ | 2.26 | Doug Drabek | 94.7 | PIT |
| +044+ | 2.22 | Roger Clemens | 111.3 | BOS |
| +045+ | 2.22 | John Cerutti | 89.3 | TOR |
| +046+ | 2.21 | Jeff Ballard | 83 | BAL |
| +049+ | 2.19 | Chris Bosio | 97.7 | MIL |
| +048+ | 2.19 | Todd Burns | 49.7 | OAK |
| +058+ | 1.99 | Bret Saberhagen | 100.3 | KCA |
| +060+ | 1.97 | Bob Welch | 93.3 | OAK |
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