| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rick Reuschel | SFN | 8.13 | 198906210_HOU_SFN |
| Roger Clemens | BOS | 7.84 | 198906210_TEX_BOS |
| Dennis Martinez | WAS | 4.59 | 198906200_WAS_NYN |
| Doug Drabek | PIT | 3.54 | 198906210_CHN_PIT |
| Bret Saberhagen | KCA | 2.91 | 198906210_KCA_MIL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bobby Witt | TEX | -5.59 | 198906210_TEX_BOS |
| Jerry Reuss | CHA | -2.47 | 198906200_CHA_NYA |
| Mike Smithson | BOS | -1.88 | 198906220_TEX_BOS |
| Storm Davis | OAK | -1.83 | 198906200_DET_OAK |
| Andy Hawkins | NYA | -1.51 | 198906210_CHA_NYA |
Based on accumulated WAA for this season up to 1989-06-22.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 4.41 | Rick Reuschel | 119 | SFN |
| +004+ | 4.1 | Mike Morgan | 87.3 | LAN |
| +005+ | 3.98 | Mike Moore | 109.3 | OAK |
| +007+ | 3.79 | John Smoltz | 110.7 | ATL |
| +013+ | 3.32 | Greg Swindell | 112.3 | CLE |
| +011+ | 3.32 | Scott Garrelts | 103.7 | SFN |
| +012+ | 3.32 | Mark Gubicza | 130.3 | KCA |
| +014+ | 3.31 | Bryn Smith | 99.3 | WAS |
| +015+ | 3.26 | Mike Scott | 114.3 | HOU |
| +016+ | 3.18 | Bert Blyleven | 103 | ANA |
| +018+ | 3.02 | Doug Drabek | 103.7 | PIT |
| +021+ | 3 | Orel Hershiser | 112 | LAN |
| +023+ | 2.9 | Chuck Finley | 97.3 | ANA |
| +025+ | 2.79 | Bret Saberhagen | 109.3 | KCA |
| +031+ | 2.73 | Dwight Gooden | 106 | NYN |
| +034+ | 2.68 | Todd Burns | 55.3 | OAK |
| +037+ | 2.64 | Ed Whitson | 109.3 | SDN |
| +041+ | 2.38 | Mike Bielecki | 79.3 | CHN |
| +044+ | 2.33 | John Cerutti | 96.3 | TOR |
| +051+ | 2.15 | Chris Bosio | 104.3 | MIL |
| +053+ | 2.05 | Don Robinson | 96 | SFN |
| +058+ | 2.01 | Dennis Martinez | 111 | WAS |
| +062+ | 1.97 | Bob Welch | 93.3 | OAK |
| +063+ | 1.94 | Roger Clemens | 117 | BOS |
| +064+ | 1.93 | Jay Tibbs | 42.3 | BAL |
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