| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rick Reuschel | SFN | 8.77 | 198906260_SFN_HOU |
| Orel Hershiser | LAN | 7.84 | 198906250_LAN_CIN |
| Mike Scott | HOU | 6.67 | 198906240_HOU_ATL |
| 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 |
| Bill Swift | SEA | -3.2 | 198906250_DET_SEA |
| Jerry Reuss | CHA | -2.66 | 198906250_CHA_MIL |
| Storm Davis | OAK | -2.17 | 198906250_TOR_OAK |
| Bruce Ruffin | PHI | -2.06 | 198906260_PHI_SLN |
Based on accumulated WAA for this season up to 1989-06-26.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 4.47 | Rick Reuschel | 124 | SFN |
| +005+ | 4.24 | Mike Morgan | 93.3 | LAN |
| +006+ | 4.12 | Mark Gubicza | 139.3 | KCA |
| +007+ | 4.06 | Mike Moore | 117.3 | OAK |
| +008+ | 3.82 | Orel Hershiser | 121 | LAN |
| +009+ | 3.82 | John Smoltz | 110.7 | ATL |
| +010+ | 3.61 | Doug Drabek | 112.7 | PIT |
| +015+ | 3.35 | Greg Swindell | 119.3 | CLE |
| +016+ | 3.34 | Bryn Smith | 99.3 | WAS |
| +017+ | 3.28 | Chuck Finley | 106.3 | ANA |
| +019+ | 3.2 | Bert Blyleven | 103 | ANA |
| +022+ | 3.05 | Mike Scott | 121.3 | HOU |
| +026+ | 2.82 | Bret Saberhagen | 109.3 | KCA |
| +033+ | 2.67 | Ed Whitson | 109.3 | SDN |
| +034+ | 2.61 | Don Robinson | 104.7 | SFN |
| +036+ | 2.55 | Dennis Martinez | 117 | WAS |
| +039+ | 2.53 | Todd Burns | 56 | OAK |
| +046+ | 2.38 | John Cerutti | 96.3 | TOR |
| +047+ | 2.34 | Scott Garrelts | 106.3 | SFN |
| +049+ | 2.32 | Chris Bosio | 113.3 | MIL |
| +055+ | 2.19 | Mike Bielecki | 86.7 | CHN |
| +057+ | 2.15 | Jose Rijo | 98 | CIN |
| +059+ | 2.06 | Dwight Gooden | 110 | NYN |
| +062+ | 2.05 | Nolan Ryan | 112.7 | TEX |
| +064+ | 1.98 | Bob Welch | 93.3 | OAK |
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