| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Clemens | BOS | 6.65 | 199006080_CLE_BOS |
| Dennis Martinez | WAS | 5.26 | 199006080_SLN_WAS |
| Dave Stewart | OAK | 3.65 | 199006090_KCA_OAK |
| Chris Bosio | MIL | 3.54 | 199006090_TOR_MIL |
| Bret Saberhagen | KCA | 3.41 | 199006070_ANA_KCA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Clancy | HOU | -2.85 | 199006090_CIN_HOU |
| Bobby Witt | TEX | -2.75 | 199006070_OAK_TEX |
| Todd Stottlemyre | TOR | -2.16 | 199006070_MIN_TOR |
| Curt Young | OAK | -1.9 | 199006080_KCA_OAK |
| Derek Lilliquist | ATL | -1.85 | 199006080_SFN_ATL |
Based on accumulated WAA for this season up to 1990-06-09.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +004+ | 3.9 | Jack Armstrong | 76.3 | CIN |
| +005+ | 3.77 | Tom Browning | 91.3 | CIN |
| +006+ | 3.74 | Frank Viola | 78 | NYN |
| +008+ | 3.48 | Dave Stewart | 89.7 | OAK |
| +011+ | 3.09 | Bob Welch | 85.3 | OAK |
| +013+ | 2.96 | Roger Clemens | 96 | BOS |
| +015+ | 2.8 | Teddy Higuera | 55.3 | MIL |
| +018+ | 2.56 | Dennis Martinez | 86 | WAS |
| +021+ | 2.54 | Bret Saberhagen | 87.7 | KCA |
| +020+ | 2.54 | Mark Gardner | 65 | WAS |
| +023+ | 2.4 | Dave Stieb | 77 | TOR |
| +025+ | 2.37 | Bud Black | 84 | CLE |
| +026+ | 2.3 | Doug Drabek | 75 | PIT |
| +028+ | 2.27 | Eric King | 69 | CHA |
| +031+ | 2.14 | Tim Leary | 79.3 | NYA |
| +033+ | 2.11 | Mike Morgan | 77.7 | LAN |
| +036+ | 2.02 | Kirk McCaskill | 57.3 | ANA |
| +037+ | 1.97 | Chuck Finley | 73 | ANA |
| +043+ | 1.9 | Dan Petry | 68.7 | DET |
| +044+ | 1.89 | Neal Heaton | 68.3 | PIT |
| +045+ | 1.83 | Chris Bosio | 90.3 | MIL |
| +046+ | 1.81 | Ed Whitson | 79.3 | SDN |
| +078+ | 1.33 | Greg Hibbard | 63.3 | CHA |
| +080+ | 1.3 | Mike Boddicker | 80.3 | BOS |
| +086+ | 1.28 | Ramon Martinez | 71 | LAN |
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