| Starter | Tm | Tier | Game |
|---|---|---|---|
| Orel Hershiser | LAN | 8.7 | 198906190_LAN_SDN |
| Mark Gubicza | KCA | 6.96 | 198906170_KCA_CLE |
| Mike Scott | HOU | 6.16 | 198906180_HOU_SDN |
| Dwight Gooden | NYN | 5.59 | 198906190_WAS_NYN |
| Don Robinson | SFN | 3.03 | 198906190_HOU_SFN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bill Swift | SEA | -4.09 | 198906190_BAL_SEA |
| Melido Perez | CHA | -3.58 | 198906170_BOS_CHA |
| Mike Smithson | BOS | -2.6 | 198906170_BOS_CHA |
| Bob Knepper | HOU | -1.7 | 198906190_HOU_SFN |
| David Palmer | DET | -1.61 | 198906180_ANA_DET |
Based on accumulated WAA for this season up to 1989-06-19.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 4.06 | Mike Morgan | 87.3 | LAN |
| +004+ | 3.75 | Rick Reuschel | 111.7 | SFN |
| +006+ | 3.51 | Mike Moore | 101 | OAK |
| +008+ | 3.32 | Mark Gubicza | 130.3 | KCA |
| +010+ | 3.3 | John Smoltz | 105.3 | ATL |
| +012+ | 3.29 | Greg Swindell | 112.3 | CLE |
| +013+ | 3.23 | Ed Whitson | 104.3 | SDN |
| +014+ | 3.19 | Mike Scott | 114.3 | HOU |
| +016+ | 2.94 | Orel Hershiser | 112 | LAN |
| +017+ | 2.94 | Chuck Finley | 97.3 | ANA |
| +020+ | 2.88 | Bryn Smith | 92.3 | WAS |
| +027+ | 2.7 | Kirk McCaskill | 89.7 | ANA |
| +028+ | 2.69 | Dwight Gooden | 106 | NYN |
| +030+ | 2.67 | Scott Garrelts | 96.3 | SFN |
| +031+ | 2.65 | Bert Blyleven | 94 | ANA |
| +040+ | 2.41 | Dennis Martinez | 104 | WAS |
| +041+ | 2.4 | Mike Bielecki | 79.3 | CHN |
| +042+ | 2.38 | Todd Burns | 51.7 | OAK |
| +045+ | 2.29 | Doug Drabek | 94.7 | PIT |
| +046+ | 2.26 | Roger Clemens | 111.3 | BOS |
| +049+ | 2.24 | John Cerutti | 89.3 | TOR |
| +050+ | 2.23 | Jeff Ballard | 83 | BAL |
| +054+ | 2.16 | Chris Bosio | 104.3 | MIL |
| +059+ | 2.03 | Bret Saberhagen | 100.3 | KCA |
| +061+ | 2.01 | Don Robinson | 96 | SFN |
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