| Starter | Tm | Tier | Game |
|---|---|---|---|
| Chuck Finley | ANA | 6.45 | 199008170_ANA_BOS |
| Frank Viola | NYN | 4.74 | 199008170_NYN_SFN |
| Ed Whitson | SDN | 4.7 | 199008160_WAS_SDN |
| Danny Darwin | HOU | 4.01 | 199008160_HOU_SLN |
| Bill Swift | SEA | 2.76 | 199008170_SEA_NYA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jack Morris | DET | -5.67 | 199008170_CLE_DET |
| Andy Hawkins | NYA | -4.66 | 199008170_SEA_NYA |
| Allan Anderson | MIN | -1.55 | 199008180_TOR_MIN |
| Jaime Navarro | MIL | -1.33 | 199008180_KCA_MIL |
| Jeff Shaw | CLE | -1.24 | 199008180_CLE_DET |
Based on accumulated WAA for this season up to 1990-08-18.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 8.51 | Roger Clemens | 192 | BOS |
| +004+ | 6.68 | Dave Stewart | 200 | OAK |
| +005+ | 6.66 | Chuck Finley | 177 | ANA |
| +008+ | 5.25 | Ed Whitson | 174 | SDN |
| +011+ | 4.88 | Danny Darwin | 106.3 | HOU |
| +012+ | 4.81 | Bill Swift | 101.7 | SEA |
| +015+ | 4.56 | Frank Viola | 174.3 | NYN |
| +030+ | 3.87 | Dennis Martinez | 181.7 | WAS |
| +033+ | 3.56 | Norm Charlton | 98 | CIN |
| +035+ | 3.43 | Tom Browning | 183 | CIN |
| +043+ | 3.14 | Bob Welch | 174.7 | OAK |
| +049+ | 3.03 | Dave Stieb | 147.3 | TOR |
| +050+ | 3.02 | Oil Can Boyd | 141.7 | WAS |
| +063+ | 2.71 | Bob Tewksbury | 97 | SLN |
| +065+ | 2.6 | Tom Candiotti | 162 | CLE |
| +068+ | 2.55 | Greg Hibbard | 149.3 | CHA |
| +067+ | 2.55 | Ben McDonald | 53.3 | BAL |
| +070+ | 2.48 | Randy Johnson | 164 | SEA |
| +071+ | 2.47 | Kirk McCaskill | 128 | ANA |
| +076+ | 2.32 | Kevin Appier | 126 | KCA |
| +087+ | 2.13 | Zane Smith | 155 | TOT |
| +088+ | 2.12 | Mark Gardner | 136.3 | WAS |
| +089+ | 2.11 | Mike Morgan | 162.7 | LAN |
| +093+ | 2.01 | Mike Harkey | 147 | CHN |
| +101+ | 1.97 | Jack Armstrong | 150.3 | CIN |
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