| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Clemens | BOS | 15.86 | 199008300_BOS_CLE |
| Dave Stewart | OAK | 5.2 | 199008300_KCA_OAK |
| Frank Viola | NYN | 4.63 | 199008310_SFN_NYN |
| Dennis Martinez | WAS | 3.86 | 199008290_SFN_WAS |
| Doug Drabek | PIT | 3.24 | 199008290_PIT_ATL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Frank Tanana | DET | -10.34 | 199008300_DET_SEA |
| Mike Bielecki | CHN | -3.49 | 199008300_CIN_CHN |
| David West | MIN | -2.82 | 199008300_CHA_MIN |
| Jim Abbott | ANA | -2.05 | 199008290_TEX_ANA |
| Sergio Valdez | CLE | -1.83 | 199008300_BOS_CLE |
Based on accumulated WAA for this season up to 1990-08-31.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 10 | Roger Clemens | 217 | BOS |
| +005+ | 6.57 | Ed Whitson | 191.7 | SDN |
| +007+ | 5.81 | Danny Darwin | 124.3 | HOU |
| +008+ | 5.77 | Chuck Finley | 188.7 | ANA |
| +012+ | 5.33 | Frank Viola | 198.3 | NYN |
| +013+ | 5.3 | Dave Stewart | 218 | OAK |
| +016+ | 4.73 | Doug Drabek | 185.3 | PIT |
| +018+ | 4.56 | Norm Charlton | 119 | CIN |
| +020+ | 4.45 | Bill Swift | 109.7 | SEA |
| +023+ | 4.27 | Dennis Martinez | 203.7 | WAS |
| +031+ | 3.8 | Ramon Martinez | 188 | LAN |
| +037+ | 3.62 | Kevin Appier | 141 | KCA |
| +040+ | 3.44 | Bob Tewksbury | 113 | SLN |
| +047+ | 3.16 | Greg Hibbard | 171 | CHA |
| +048+ | 3.12 | Bob Welch | 193.7 | OAK |
| +058+ | 2.93 | Zane Smith | 169.3 | TOT |
| +057+ | 2.93 | Dave Stieb | 161.3 | TOR |
| +060+ | 2.91 | Kirk McCaskill | 142.7 | ANA |
| +066+ | 2.78 | Tom Browning | 190.7 | CIN |
| +067+ | 2.76 | Mark Gardner | 149 | WAS |
| +070+ | 2.61 | Greg Harris | 156.3 | BOS |
| +081+ | 2.27 | Mike Morgan | 182.7 | LAN |
| +083+ | 2.26 | Greg Maddux | 189.7 | CHN |
| +086+ | 2.22 | Randy Johnson | 185 | SEA |
| +093+ | 2.16 | Oil Can Boyd | 151.7 | WAS |
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