| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bobby Witt | TEX | -5.59 | 198906210_TEX_BOS |
| Bill Swift | SEA | -4.09 | 198906190_BAL_SEA |
| Jerry Reuss | CHA | -2.47 | 198906200_CHA_NYA |
| Storm Davis | OAK | -1.83 | 198906200_DET_OAK |
| Bob Knepper | HOU | -1.7 | 198906190_HOU_SFN |
Based on accumulated WAA for this season up to 1989-06-21.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 4.38 | Rick Reuschel | 119 | SFN |
| +004+ | 4.08 | Mike Morgan | 87.3 | LAN |
| +005+ | 4.01 | Mike Moore | 109.3 | OAK |
| +007+ | 3.75 | John Smoltz | 110.7 | ATL |
| +013+ | 3.29 | Greg Swindell | 112.3 | CLE |
| +011+ | 3.29 | Scott Garrelts | 103.7 | SFN |
| +012+ | 3.29 | Mark Gubicza | 130.3 | KCA |
| +014+ | 3.28 | Bryn Smith | 99.3 | WAS |
| +015+ | 3.23 | Mike Scott | 114.3 | HOU |
| +017+ | 3.15 | Bert Blyleven | 103 | ANA |
| +020+ | 2.99 | Doug Drabek | 103.7 | PIT |
| +021+ | 2.97 | Orel Hershiser | 112 | LAN |
| +024+ | 2.87 | Chuck Finley | 97.3 | ANA |
| +027+ | 2.77 | Bret Saberhagen | 109.3 | KCA |
| +032+ | 2.7 | Dwight Gooden | 106 | NYN |
| +035+ | 2.61 | Ed Whitson | 109.3 | SDN |
| +038+ | 2.55 | Todd Burns | 53.7 | OAK |
| +044+ | 2.36 | Mike Bielecki | 79.3 | CHN |
| +048+ | 2.17 | John Cerutti | 89.3 | TOR |
| +051+ | 2.13 | Chris Bosio | 104.3 | MIL |
| +056+ | 2.02 | Don Robinson | 96 | SFN |
| +059+ | 2 | Bob Welch | 93.3 | OAK |
| +061+ | 1.98 | Dennis Martinez | 111 | WAS |
| +062+ | 1.92 | Jay Tibbs | 42.3 | BAL |
| +064+ | 1.9 | Roger Clemens | 117 | BOS |
_