| Starter | Tm | Tier | Game |
|---|---|---|---|
| Mark Gubicza | KCA | 7.56 | 198906280_SEA_KCA |
| Mike Scott | HOU | 5.73 | 198906290_HOU_WAS |
| Roger Clemens | BOS | 5.62 | 198906270_BOS_MIL |
| Don Robinson | SFN | 3.69 | 198906280_SFN_HOU |
| Bryn Smith | WAS | 2.64 | 198906270_NYN_WAS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Melido Perez | CHA | -4.69 | 198906290_KCA_CHA |
| Mike Smithson | BOS | -2.48 | 198906280_BOS_MIL |
| Paul Kilgus | CHN | -0.86 | 198906290_CHN_SFN |
| Dave LaPoint | NYA | -0.83 | 198906290_NYA_DET |
| Brian Holman | SEA | -0.68 | 198906270_SEA_KCA |
Based on accumulated WAA for this season up to 1989-06-29.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 4.54 | Rick Reuschel | 124 | SFN |
| +004+ | 4.4 | Mike Morgan | 101 | LAN |
| +006+ | 4.12 | Mike Moore | 117.3 | OAK |
| +007+ | 3.96 | John Smoltz | 116.7 | ATL |
| +009+ | 3.75 | Orel Hershiser | 121 | LAN |
| +010+ | 3.69 | Bryn Smith | 106.3 | WAS |
| +011+ | 3.65 | Mark Gubicza | 145.3 | KCA |
| +012+ | 3.64 | Doug Drabek | 112.7 | PIT |
| +014+ | 3.6 | Bert Blyleven | 109.7 | ANA |
| +015+ | 3.36 | Greg Swindell | 119.3 | CLE |
| +018+ | 3.33 | Mike Scott | 129.3 | HOU |
| +019+ | 3.31 | Chuck Finley | 106.3 | ANA |
| +026+ | 2.98 | Ed Whitson | 116.3 | SDN |
| +030+ | 2.88 | Bret Saberhagen | 114.3 | KCA |
| +035+ | 2.71 | Chris Bosio | 122.3 | MIL |
| +037+ | 2.67 | John Cerutti | 104 | TOR |
| +042+ | 2.56 | Todd Burns | 56 | OAK |
| +043+ | 2.51 | Dennis Martinez | 117 | WAS |
| +045+ | 2.46 | Mike Bielecki | 94.3 | CHN |
| +049+ | 2.36 | Scott Garrelts | 108.3 | SFN |
| +050+ | 2.35 | Kevin Brown | 108.7 | TEX |
| +058+ | 2.07 | Nolan Ryan | 112.7 | TEX |
| +059+ | 2.05 | Dwight Gooden | 110 | NYN |
| +062+ | 2.03 | Bob Welch | 93.3 | OAK |
| +063+ | 2 | Greg Maddux | 106 | CHN |
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