| Starter | Tm | Tier | Game |
|---|---|---|---|
| Walt Terrell | PIT | -4.1 | 199006220_PIT_WAS |
| Bobby Witt | TEX | -2.1 | 199006230_SEA_TEX |
| David West | MIN | -1.61 | 199006230_KCA_MIN |
| Frank Tanana | DET | -1.57 | 199006240_DET_ANA |
| Storm Davis | KCA | -1.46 | 199006240_KCA_MIN |
Based on accumulated WAA for this season up to 1990-06-24.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +006+ | 4.06 | Jack Armstrong | 94 | CIN |
| +008+ | 3.84 | Roger Clemens | 114.7 | BOS |
| +012+ | 3.57 | Dennis Martinez | 108 | WAS |
| +013+ | 3.52 | Bob Welch | 106 | OAK |
| +015+ | 3.46 | Dave Stieb | 91.7 | TOR |
| +018+ | 3.41 | Chuck Finley | 95.3 | ANA |
| +017+ | 3.41 | Eric King | 83.7 | CHA |
| +019+ | 3.38 | Tom Browning | 112 | CIN |
| +021+ | 3.24 | Frank Viola | 97.3 | NYN |
| +023+ | 3.14 | Mark Gardner | 78 | WAS |
| +024+ | 3.05 | Dave Stewart | 114.7 | OAK |
| +028+ | 2.68 | Bret Saberhagen | 109 | KCA |
| +031+ | 2.56 | Ramon Martinez | 94 | LAN |
| +033+ | 2.52 | Kirk McCaskill | 69.3 | ANA |
| +043+ | 2.22 | Neal Heaton | 87.3 | PIT |
| +045+ | 2.19 | Ed Whitson | 100.3 | SDN |
| +046+ | 2.14 | Kevin Brown | 103.7 | TEX |
| +048+ | 2.07 | John Tudor | 73 | SLN |
| +053+ | 2 | Greg Hibbard | 82 | CHA |
| +054+ | 1.99 | Doug Drabek | 91.7 | PIT |
| +058+ | 1.94 | Charlie Leibrandt | 32 | ATL |
| +062+ | 1.82 | Mike Morgan | 99.7 | LAN |
| +068+ | 1.77 | Mike Boddicker | 103.7 | BOS |
| +077+ | 1.66 | Andy Benes | 87.7 | SDN |
| +083+ | 1.58 | Mark Langston | 98.3 | ANA |
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