| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rick Reuschel | SFN | 8.77 | 198906260_SFN_HOU |
| Mark Gubicza | KCA | 7.56 | 198906280_SEA_KCA |
| Roger Clemens | BOS | 5.62 | 198906270_BOS_MIL |
| Dwight Gooden | NYN | 4.82 | 198906260_NYN_WAS |
| Doug Drabek | PIT | 4.27 | 198906260_PIT_CHN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bobby Witt | TEX | -5.38 | 198906260_CLE_TEX |
| Mike Smithson | BOS | -2.48 | 198906280_BOS_MIL |
| Bruce Ruffin | PHI | -2.06 | 198906260_PHI_SLN |
| Brian Holman | SEA | -0.68 | 198906270_SEA_KCA |
| Steve Rosenberg | CHA | -0.5 | 198906280_TEX_CHA |
Based on accumulated WAA for this season up to 1989-06-28.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 4.52 | Rick Reuschel | 124 | SFN |
| +005+ | 4.38 | Mike Morgan | 101 | LAN |
| +006+ | 4.1 | Mike Moore | 117.3 | OAK |
| +007+ | 3.94 | John Smoltz | 116.7 | ATL |
| +008+ | 3.73 | Orel Hershiser | 121 | LAN |
| +010+ | 3.68 | Bryn Smith | 106.3 | WAS |
| +012+ | 3.63 | Doug Drabek | 112.7 | PIT |
| +013+ | 3.61 | Mark Gubicza | 145.3 | KCA |
| +014+ | 3.58 | Bert Blyleven | 109.7 | ANA |
| +018+ | 3.34 | Greg Swindell | 119.3 | CLE |
| +019+ | 3.29 | Chuck Finley | 106.3 | ANA |
| +025+ | 3.07 | Mike Scott | 121.3 | HOU |
| +027+ | 2.96 | Ed Whitson | 116.3 | SDN |
| +031+ | 2.84 | Bret Saberhagen | 109.3 | KCA |
| +037+ | 2.65 | John Cerutti | 104 | TOR |
| +038+ | 2.55 | Todd Burns | 56 | OAK |
| +041+ | 2.49 | Dennis Martinez | 117 | WAS |
| +047+ | 2.43 | Mike Bielecki | 94.3 | CHN |
| +048+ | 2.38 | Scott Garrelts | 106.3 | SFN |
| +049+ | 2.34 | Kevin Brown | 108.7 | TEX |
| +050+ | 2.33 | Chris Bosio | 113.3 | MIL |
| +059+ | 2.06 | Nolan Ryan | 112.7 | TEX |
| +061+ | 2.03 | Dwight Gooden | 110 | NYN |
| +062+ | 2.01 | Bob Welch | 93.3 | OAK |
| +064+ | 1.97 | Don Robinson | 109 | SFN |
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