| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Clemens | BOS | 12.03 | 199007300_CHA_BOS |
| Dennis Martinez | WAS | 6.56 | 199007280_CHN_WAS |
| Bob Welch | OAK | 4.45 | 199007282_OAK_MIN |
| Danny Darwin | HOU | 4.03 | 199007300_HOU_SFN |
| Ed Whitson | SDN | 3.86 | 199007300_ATL_SDN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Frank Tanana | DET | -7.6 | 199007280_BOS_DET |
| Bert Blyleven | ANA | -2.75 | 199007300_ANA_MIN |
| David West | MIN | -2.7 | 199007290_OAK_MIN |
| 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 1990-07-30.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 6.99 | Roger Clemens | 167.7 | BOS |
| +005+ | 5.36 | Frank Viola | 149 | NYN |
| +008+ | 5 | Chuck Finley | 144 | ANA |
| +010+ | 4.54 | Mark Gardner | 126.7 | WAS |
| +011+ | 4.5 | Danny Darwin | 88.3 | HOU |
| +016+ | 4.1 | Tom Browning | 159.7 | CIN |
| +019+ | 3.84 | Dave Stewart | 163.3 | OAK |
| +020+ | 3.81 | Ed Whitson | 149.7 | SDN |
| +022+ | 3.71 | Ramon Martinez | 144.3 | LAN |
| +026+ | 3.45 | Dennis Martinez | 156.3 | WAS |
| +033+ | 3.13 | Doug Drabek | 141 | PIT |
| +034+ | 3.13 | Bill Swift | 75.7 | SEA |
| +037+ | 2.95 | Dave Stieb | 121.7 | TOR |
| +038+ | 2.89 | Kirk McCaskill | 104.3 | ANA |
| +043+ | 2.79 | Bob Welch | 147 | OAK |
| +045+ | 2.77 | Greg Hibbard | 127 | CHA |
| +053+ | 2.45 | Jack Armstrong | 136.7 | CIN |
| +058+ | 2.37 | Oil Can Boyd | 116.7 | WAS |
| +059+ | 2.36 | Kevin Brown | 153.3 | TEX |
| +064+ | 2.31 | Greg Harris | 114.3 | BOS |
| +067+ | 2.25 | Bud Black | 149.7 | CLE |
| +077+ | 2.09 | Dave Wells | 105 | TOR |
| +080+ | 2.06 | Tom Candiotti | 131.7 | CLE |
| +088+ | 1.99 | Zane Smith | 126.3 | WAS |
| +091+ | 1.9 | Norm Charlton | 74.7 | CIN |
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