| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dennis Martinez | WAS | 6.45 | 199006240_PIT_WAS |
| Roger Clemens | BOS | 6.36 | 199006230_BAL_BOS |
| Dave Stieb | TOR | 4.66 | 199006250_TOR_BOS |
| Tom Browning | CIN | 4.62 | 199006230_LAN_CIN |
| Bob Welch | OAK | 3.87 | 199006250_DET_OAK |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| 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 |
| Jim Abbott | ANA | -1.37 | 199006230_DET_ANA |
Based on accumulated WAA for this season up to 1990-06-25.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +004+ | 4.37 | Jack Armstrong | 102 | CIN |
| +007+ | 3.84 | Roger Clemens | 114.7 | BOS |
| +011+ | 3.63 | Bob Welch | 114 | OAK |
| +012+ | 3.57 | Dennis Martinez | 108 | WAS |
| +017+ | 3.41 | Chuck Finley | 95.3 | ANA |
| +016+ | 3.41 | Eric King | 83.7 | CHA |
| +018+ | 3.38 | Tom Browning | 112 | CIN |
| +021+ | 3.24 | Frank Viola | 97.3 | NYN |
| +022+ | 3.18 | Ramon Martinez | 103 | LAN |
| +024+ | 3.06 | Dave Stewart | 114.7 | OAK |
| +023+ | 3.06 | Mark Gardner | 84 | WAS |
| +028+ | 2.76 | Greg Hibbard | 90.3 | CHA |
| +029+ | 2.69 | Bret Saberhagen | 109 | KCA |
| +033+ | 2.52 | Kirk McCaskill | 69.3 | ANA |
| +037+ | 2.51 | John Tudor | 80 | SLN |
| +046+ | 2.22 | Neal Heaton | 87.3 | PIT |
| +047+ | 2.21 | Dave Stieb | 91.7 | TOR |
| +048+ | 2.2 | Ed Whitson | 100.3 | SDN |
| +049+ | 2.16 | Kevin Brown | 103.7 | TEX |
| +054+ | 1.99 | Doug Drabek | 91.7 | PIT |
| +058+ | 1.89 | Mark Langston | 106.3 | ANA |
| +062+ | 1.82 | Mike Morgan | 99.7 | LAN |
| +070+ | 1.78 | Mike Boddicker | 103.7 | BOS |
| +081+ | 1.64 | Charlie Leibrandt | 40 | ATL |
| +098+ | 1.39 | Greg Harris | 76.7 | BOS |
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