| Starter | Tm | Tier | Game |
|---|---|---|---|
| Frank Viola | NYN | 7.43 | 199007270_SLN_NYN |
| Dennis Martinez | WAS | 6.56 | 199007280_CHN_WAS |
| Chuck Finley | ANA | 4.92 | 199007260_ANA_OAK |
| Bob Welch | OAK | 4.45 | 199007282_OAK_MIN |
| Tom Browning | CIN | 3.55 | 199007280_CIN_SFN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Frank Tanana | DET | -7.6 | 199007280_BOS_DET |
| Andy Hawkins | NYA | -6.81 | 199007271_NYA_CLE |
| Eric Show | SDN | -2.72 | 199007260_HOU_SDN |
| Mike Bielecki | CHN | -2.41 | 199007280_CHN_WAS |
| Bruce Ruffin | PHI | -1.89 | 199007280_PHI_PIT |
Based on accumulated WAA for this season up to 1990-07-28.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 6.17 | Roger Clemens | 158.7 | BOS |
| +005+ | 5.36 | Frank Viola | 149 | NYN |
| +008+ | 4.98 | Chuck Finley | 144 | ANA |
| +009+ | 4.54 | Mark Gardner | 126.7 | WAS |
| +016+ | 4.07 | Tom Browning | 159.7 | CIN |
| +017+ | 3.98 | Danny Darwin | 80.3 | HOU |
| +019+ | 3.84 | Dave Stewart | 163.3 | OAK |
| +021+ | 3.61 | Ramon Martinez | 136.3 | LAN |
| +024+ | 3.57 | John Tudor | 115 | SLN |
| +025+ | 3.45 | Dennis Martinez | 156.3 | WAS |
| +026+ | 3.42 | Ed Whitson | 142.7 | SDN |
| +031+ | 3.12 | Bill Swift | 75.7 | SEA |
| +033+ | 3.09 | Greg Hibbard | 121 | CHA |
| +036+ | 2.95 | Dave Stieb | 121.7 | TOR |
| +039+ | 2.88 | Kirk McCaskill | 104.3 | ANA |
| +045+ | 2.8 | Bud Black | 146.3 | CLE |
| +046+ | 2.79 | Bob Welch | 147 | OAK |
| +049+ | 2.75 | Dave Wells | 103 | TOR |
| +055+ | 2.53 | Doug Drabek | 132 | PIT |
| +061+ | 2.38 | Oil Can Boyd | 116.7 | WAS |
| +063+ | 2.34 | Kevin Brown | 153.3 | TEX |
| +078+ | 1.99 | Greg Harris | 106.3 | BOS |
| +084+ | 1.93 | Mark Knudson | 121 | MIL |
| +087+ | 1.9 | Zane Smith | 125.3 | WAS |
| +088+ | 1.89 | Norm Charlton | 67.7 | CIN |
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