| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Clemens | BOS | 9.63 | 199007141_KCA_BOS |
| Frank Viola | NYN | 9.5 | 199007130_NYN_CIN |
| Dennis Martinez | WAS | 5.86 | 199007141_WAS_ATL |
| Ted Higuera | MIL | 4.22 | 199007120_MIL_OAK |
| Dave Stewart | OAK | 4.12 | 199007130_MIL_OAK |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Frank Tanana | DET | -5.02 | 199007130_TEX_DET |
| Andy Hawkins | NYA | -2.4 | 199007120_CHA_NYA |
| Bert Blyleven | ANA | -1.66 | 199007140_TOR_ANA |
| Todd Stottlemyre | TOR | -1.61 | 199007130_TOR_ANA |
| David West | MIN | -1.59 | 199007132_MIN_BAL |
Based on accumulated WAA for this season up to 1990-07-14.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +004+ | 5.13 | Roger Clemens | 142.7 | BOS |
| +007+ | 4.55 | Frank Viola | 128 | NYN |
| +013+ | 3.9 | Mark Gardner | 104.7 | WAS |
| +015+ | 3.82 | Dennis Martinez | 136 | WAS |
| +017+ | 3.73 | Jack Armstrong | 118 | CIN |
| +018+ | 3.65 | Chuck Finley | 117 | ANA |
| +019+ | 3.54 | Bob Welch | 131 | OAK |
| +020+ | 3.4 | Dave Stewart | 141 | OAK |
| +021+ | 3.35 | Tom Browning | 137 | CIN |
| +023+ | 3.23 | Greg Hibbard | 108.3 | CHA |
| +024+ | 3.15 | Bud Black | 132 | CLE |
| +035+ | 2.71 | Ed Whitson | 121.3 | SDN |
| +044+ | 2.4 | Zane Smith | 104.3 | WAS |
| +046+ | 2.37 | Trevor Wilson | 56.3 | SFN |
| +048+ | 2.35 | John Tudor | 92 | SLN |
| +049+ | 2.33 | Danny Darwin | 57.3 | HOU |
| +053+ | 2.23 | Ramon Martinez | 120.3 | LAN |
| +058+ | 2.13 | Oil Can Boyd | 103.7 | WAS |
| +057+ | 2.13 | Teddy Higuera | 72 | MIL |
| +061+ | 2.09 | Mike Morgan | 123.3 | LAN |
| +062+ | 2.04 | Doug Drabek | 116.7 | PIT |
| +065+ | 2 | Eric King | 99.3 | CHA |
| +068+ | 1.96 | Kevin Brown | 129.3 | TEX |
| +078+ | 1.76 | Dave Wells | 88.7 | TOR |
| +081+ | 1.74 | Dave Stieb | 100 | TOR |
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