| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Clemens | BOS | 14.31 | 199008190_ANA_BOS |
| Chuck Finley | ANA | 6.45 | 199008170_ANA_BOS |
| Frank Viola | NYN | 4.74 | 199008170_NYN_SFN |
| Doug Drabek | PIT | 3.49 | 199008190_PIT_CIN |
| Dennis Martinez | WAS | 3.45 | 199008190_WAS_LAN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jack Morris | DET | -5.67 | 199008170_CLE_DET |
| Andy Hawkins | NYA | -4.66 | 199008170_SEA_NYA |
| Jim Abbott | ANA | -1.72 | 199008190_ANA_BOS |
| Allan Anderson | MIN | -1.55 | 199008180_TOR_MIN |
| Jaime Navarro | MIL | -1.33 | 199008180_KCA_MIL |
Based on accumulated WAA for this season up to 1990-08-19.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 8.92 | Roger Clemens | 199 | BOS |
| +005+ | 6.69 | Dave Stewart | 200 | OAK |
| +006+ | 6.67 | Chuck Finley | 177 | ANA |
| +008+ | 5.24 | Ed Whitson | 174 | SDN |
| +011+ | 4.89 | Danny Darwin | 106.3 | HOU |
| +012+ | 4.81 | Bill Swift | 101.7 | SEA |
| +017+ | 4.55 | Frank Viola | 174.3 | NYN |
| +020+ | 4.37 | Dennis Martinez | 189.7 | WAS |
| +021+ | 4.24 | Doug Drabek | 172.3 | PIT |
| +034+ | 3.56 | Norm Charlton | 98 | CIN |
| +033+ | 3.56 | Ramon Martinez | 174 | LAN |
| +036+ | 3.42 | Tom Browning | 183 | CIN |
| +042+ | 3.14 | Bob Welch | 174.7 | OAK |
| +050+ | 3.02 | Dave Stieb | 147.3 | TOR |
| +051+ | 3.01 | Oil Can Boyd | 141.7 | WAS |
| +063+ | 2.7 | Bob Tewksbury | 97 | SLN |
| +065+ | 2.59 | Tom Candiotti | 162 | CLE |
| +068+ | 2.54 | Ben McDonald | 53.3 | BAL |
| +069+ | 2.54 | Greg Hibbard | 149.3 | CHA |
| +071+ | 2.48 | Randy Johnson | 164 | SEA |
| +072+ | 2.47 | Kirk McCaskill | 128 | ANA |
| +077+ | 2.32 | Kevin Appier | 126 | KCA |
| +087+ | 2.12 | Zane Smith | 155 | TOT |
| +088+ | 2.11 | Mark Gardner | 136.3 | WAS |
| +089+ | 2.1 | Mike Morgan | 162.7 | LAN |
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