| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ed Whitson | SDN | 6.26 | 199008270_SDN_WAS |
| Chuck Finley | ANA | 5.79 | 199008270_TEX_ANA |
| Danny Darwin | HOU | 5.03 | 199008260_SLN_HOU |
| Frank Viola | NYN | 4.57 | 199008260_NYN_LAN |
| Bob Welch | OAK | 2.24 | 199008260_OAK_DET |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jeff Robinson | DET | -5.41 | 199008260_OAK_DET |
| Andy Hawkins | NYA | -3.76 | 199008270_NYA_BAL |
| Jaime Navarro | MIL | -1.7 | 199008280_MIL_TOR |
| Allan Anderson | MIN | -1.57 | 199008270_CHA_MIN |
| Kevin Gross | WAS | -0.99 | 199008260_SDN_WAS |
Based on accumulated WAA for this season up to 1990-08-28.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 9.61 | Roger Clemens | 208 | BOS |
| +005+ | 6.54 | Ed Whitson | 191.7 | SDN |
| +007+ | 5.81 | Danny Darwin | 124.3 | HOU |
| +008+ | 5.77 | Chuck Finley | 188.7 | ANA |
| +009+ | 5.51 | Dave Stewart | 211 | OAK |
| +012+ | 5.15 | Frank Viola | 189.3 | NYN |
| +014+ | 4.57 | Dennis Martinez | 197.7 | WAS |
| +018+ | 4.43 | Norm Charlton | 113 | CIN |
| +021+ | 4.3 | Bill Swift | 108 | SEA |
| +025+ | 4.14 | Doug Drabek | 179.3 | PIT |
| +036+ | 3.58 | Ramon Martinez | 181 | LAN |
| +040+ | 3.42 | Greg Hibbard | 164.7 | CHA |
| +055+ | 2.93 | Dave Stieb | 161.3 | TOR |
| +056+ | 2.91 | Kirk McCaskill | 142.7 | ANA |
| +058+ | 2.86 | Bob Tewksbury | 104 | SLN |
| +060+ | 2.78 | Kevin Appier | 132 | KCA |
| +062+ | 2.76 | Mark Gardner | 149 | WAS |
| +065+ | 2.67 | Bob Welch | 186.3 | OAK |
| +070+ | 2.55 | Mike Morgan | 176.7 | LAN |
| +073+ | 2.52 | Greg Harris | 148.3 | BOS |
| +076+ | 2.45 | Dave Wells | 139.7 | TOR |
| +085+ | 2.25 | Greg Maddux | 189.7 | CHN |
| +086+ | 2.2 | Zane Smith | 161.3 | TOT |
| +088+ | 2.16 | Oil Can Boyd | 151.7 | WAS |
| +099+ | 2.01 | Matt Young | 173.3 | SEA |
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