| 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 |
| Doug Drabek | PIT | 3.7 | 199009030_PHI_PIT |
| John Tudor | SLN | 3.46 | 199009020_SLN_ATL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Walt Terrell | DET | -5.06 | 199009030_TOR_DET |
| Andy Hawkins | NYA | -2.67 | 199009010_NYA_BOS |
| Bruce Ruffin | PHI | -2.34 | 199009030_PHI_PIT |
| Derek Lilliquist | SDN | -2.13 | 199009012_SDN_PHI |
| Jaime Navarro | MIL | -1.39 | 199009020_BAL_MIL |
Based on accumulated WAA for this season up to 1990-09-03.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 9.99 | Roger Clemens | 217 | BOS |
| +005+ | 6.99 | Ed Whitson | 198.7 | SDN |
| +006+ | 6.43 | Chuck Finley | 196 | ANA |
| +011+ | 5.33 | Frank Viola | 198.3 | NYN |
| +012+ | 5.32 | Doug Drabek | 194.3 | PIT |
| +013+ | 5.3 | Dave Stewart | 218 | OAK |
| +014+ | 5.29 | Danny Darwin | 130.3 | HOU |
| +020+ | 4.57 | Norm Charlton | 119 | CIN |
| +021+ | 4.48 | John Tudor | 138.3 | SLN |
| +028+ | 4.23 | Dennis Martinez | 203.7 | WAS |
| +034+ | 3.81 | Ramon Martinez | 188 | LAN |
| +035+ | 3.75 | Dave Stieb | 170.3 | TOR |
| +037+ | 3.64 | Kevin Appier | 148 | KCA |
| +045+ | 3.45 | Kirk McCaskill | 148.7 | ANA |
| +049+ | 3.18 | Greg Hibbard | 171 | CHA |
| +050+ | 3.12 | Bob Welch | 193.7 | OAK |
| +055+ | 3.07 | Bob Tewksbury | 118 | SLN |
| +061+ | 2.93 | Oil Can Boyd | 160.7 | WAS |
| +062+ | 2.9 | Zane Smith | 169.3 | TOT |
| +070+ | 2.61 | Greg Harris | 156.3 | BOS |
| +080+ | 2.38 | Tom Gordon | 168.7 | KCA |
| +084+ | 2.28 | Mike Morgan | 182.7 | LAN |
| +086+ | 2.22 | Randy Johnson | 185 | SEA |
| +089+ | 2.21 | Jose Rijo | 149 | CIN |
| +097+ | 2.13 | Matt Young | 188.7 | SEA |
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