| Starter | Tm | Tier | Game |
|---|---|---|---|
| Mike Scott | HOU | 6.67 | 198906240_HOU_ATL |
| Mark Gubicza | KCA | 6.08 | 198906230_NYA_KCA |
| Don Robinson | SFN | 3.07 | 198906240_SFN_SDN |
| Greg Swindell | CLE | 2.44 | 198906240_CLE_TEX |
| Mark Langston | WAS | 1.51 | 198906230_WAS_CHN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Melido Perez | CHA | -4.97 | 198906232_CHA_MIL |
| Mike Smithson | BOS | -1.88 | 198906220_TEX_BOS |
| Fred Toliver | MIN | -1.68 | 198906242_MIN_BOS |
| Mike Witt | ANA | -1.16 | 198906230_BAL_ANA |
| Kevin Gross | WAS | -1.03 | 198906240_WAS_CHN |
Based on accumulated WAA for this season up to 1989-06-24.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 4.44 | Rick Reuschel | 119 | SFN |
| +005+ | 4.22 | Mike Morgan | 93.3 | LAN |
| +006+ | 4.12 | Mark Gubicza | 139.3 | KCA |
| +007+ | 4 | Mike Moore | 109.3 | OAK |
| +008+ | 3.81 | John Smoltz | 110.7 | ATL |
| +013+ | 3.35 | Scott Garrelts | 103.7 | SFN |
| +014+ | 3.34 | Greg Swindell | 119.3 | CLE |
| +015+ | 3.33 | Bryn Smith | 99.3 | WAS |
| +016+ | 3.28 | Chuck Finley | 106.3 | ANA |
| +018+ | 3.2 | Bert Blyleven | 103 | ANA |
| +022+ | 3.05 | Doug Drabek | 103.7 | PIT |
| +023+ | 3.05 | Orel Hershiser | 112 | LAN |
| +024+ | 3.03 | Mike Scott | 121.3 | HOU |
| +027+ | 2.82 | Bret Saberhagen | 109.3 | KCA |
| +028+ | 2.75 | Dwight Gooden | 106 | NYN |
| +031+ | 2.69 | Todd Burns | 55.3 | OAK |
| +033+ | 2.67 | Ed Whitson | 109.3 | SDN |
| +036+ | 2.6 | Don Robinson | 104.7 | SFN |
| +047+ | 2.37 | John Cerutti | 96.3 | TOR |
| +048+ | 2.32 | Chris Bosio | 113.3 | MIL |
| +054+ | 2.19 | Mike Bielecki | 86.7 | CHN |
| +055+ | 2.15 | Jose Rijo | 98 | CIN |
| +059+ | 2.03 | Dennis Martinez | 111 | WAS |
| +060+ | 1.99 | Bob Welch | 93.3 | OAK |
| +063+ | 1.96 | Roger Clemens | 117 | BOS |
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