| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ed Whitson | SDN | 6.26 | 199008270_SDN_WAS |
| Chuck Finley | ANA | 5.79 | 199008270_TEX_ANA |
| Dennis Martinez | WAS | 3.86 | 199008290_SFN_WAS |
| Doug Drabek | PIT | 3.24 | 199008290_PIT_ATL |
| Tom Browning | CIN | 1.96 | 199008290_SLN_CIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Walt Terrell | DET | -5.86 | 199008290_DET_SEA |
| Andy Hawkins | NYA | -3.76 | 199008270_NYA_BAL |
| Jim Abbott | ANA | -2.05 | 199008290_TEX_ANA |
| Jaime Navarro | MIL | -1.7 | 199008280_MIL_TOR |
| Allan Anderson | MIN | -1.57 | 199008270_CHA_MIN |
Based on accumulated WAA for this season up to 1990-08-29.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 9.6 | Roger Clemens | 208 | BOS |
| +005+ | 6.55 | Ed Whitson | 191.7 | SDN |
| +007+ | 5.81 | Danny Darwin | 124.3 | HOU |
| +008+ | 5.76 | Chuck Finley | 188.7 | ANA |
| +009+ | 5.5 | Dave Stewart | 211 | OAK |
| +012+ | 5.14 | Frank Viola | 189.3 | NYN |
| +014+ | 4.72 | Doug Drabek | 185.3 | PIT |
| +018+ | 4.43 | Norm Charlton | 113 | CIN |
| +021+ | 4.29 | Bill Swift | 108 | SEA |
| +023+ | 4.26 | Dennis Martinez | 203.7 | WAS |
| +035+ | 3.59 | Kevin Appier | 141 | KCA |
| +037+ | 3.57 | Ramon Martinez | 181 | LAN |
| +040+ | 3.45 | Bob Tewksbury | 113 | SLN |
| +041+ | 3.43 | Greg Hibbard | 164.7 | CHA |
| +055+ | 2.92 | Dave Stieb | 161.3 | TOR |
| +057+ | 2.9 | Kirk McCaskill | 142.7 | ANA |
| +061+ | 2.76 | Mark Gardner | 149 | WAS |
| +062+ | 2.75 | Tom Browning | 190.7 | CIN |
| +065+ | 2.66 | Bob Welch | 186.3 | OAK |
| +071+ | 2.55 | Mike Morgan | 176.7 | LAN |
| +074+ | 2.51 | Greg Harris | 148.3 | BOS |
| +076+ | 2.45 | Dave Wells | 139.7 | TOR |
| +084+ | 2.25 | Greg Maddux | 189.7 | CHN |
| +087+ | 2.2 | Zane Smith | 161.3 | TOT |
| +089+ | 2.15 | Oil Can Boyd | 151.7 | WAS |
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