| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ed Whitson | SDN | 7.06 | 199009020_SDN_PHI |
| Danny Darwin | HOU | 5.41 | 199009020_PIT_HOU |
| Chuck Finley | ANA | 5.37 | 199009020_CHA_ANA |
| Frank Viola | NYN | 4.63 | 199008310_SFN_NYN |
| John Tudor | SLN | 3.46 | 199009020_SLN_ATL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jeff Robinson | DET | -5.65 | 199008310_DET_MIN |
| Andy Hawkins | NYA | -2.67 | 199009010_NYA_BOS |
| Derek Lilliquist | SDN | -2.13 | 199009012_SDN_PHI |
| Jaime Navarro | MIL | -1.39 | 199009020_BAL_MIL |
| Melido Perez | CHA | -1.12 | 199009010_CHA_ANA |
Based on accumulated WAA for this season up to 1990-09-02.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 9.99 | Roger Clemens | 217 | BOS |
| +005+ | 6.98 | Ed Whitson | 198.7 | SDN |
| +006+ | 6.42 | Chuck Finley | 196 | ANA |
| +011+ | 5.32 | Frank Viola | 198.3 | NYN |
| +014+ | 5.29 | Danny Darwin | 130.3 | HOU |
| +012+ | 5.29 | Dave Stewart | 218 | OAK |
| +016+ | 4.71 | Doug Drabek | 185.3 | PIT |
| +019+ | 4.55 | Norm Charlton | 119 | CIN |
| +021+ | 4.47 | John Tudor | 138.3 | SLN |
| +026+ | 4.27 | Dennis Martinez | 203.7 | WAS |
| +035+ | 3.81 | Ramon Martinez | 188 | LAN |
| +037+ | 3.73 | Dave Stieb | 170.3 | TOR |
| +038+ | 3.62 | Kevin Appier | 141 | KCA |
| +042+ | 3.45 | Bob Tewksbury | 113 | SLN |
| +049+ | 3.17 | Greg Hibbard | 171 | CHA |
| +051+ | 3.11 | Bob Welch | 193.7 | OAK |
| +059+ | 2.96 | Oil Can Boyd | 160.7 | WAS |
| +061+ | 2.92 | Zane Smith | 169.3 | TOT |
| +063+ | 2.9 | Kirk McCaskill | 142.7 | ANA |
| +067+ | 2.77 | Tom Browning | 190.7 | CIN |
| +070+ | 2.61 | Greg Harris | 156.3 | BOS |
| +079+ | 2.36 | Tom Gordon | 168.7 | KCA |
| +086+ | 2.27 | Mike Morgan | 182.7 | LAN |
| +089+ | 2.21 | Randy Johnson | 185 | SEA |
| +093+ | 2.2 | Jose Rijo | 149 | CIN |
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