| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dave Stewart | OAK | 7.35 | 199010010_ANA_OAK |
| Frank Viola | NYN | 6.32 | 199010030_NYN_PIT |
| Zane Smith | PIT | 4.45 | 199010010_NYN_PIT |
| Ramon Martinez | LAN | 2.71 | 199010010_SDN_LAN |
| Dave Stieb | TOR | 2.17 | 199010030_TOR_BAL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Frank Tanana | DET | -5.81 | 199010010_DET_NYA |
| Eric Show | SDN | -3.1 | 199010030_SDN_LAN |
| Mike Bielecki | CHN | -2.92 | 199010020_CHN_PHI |
| Melido Perez | CHA | -2.02 | 199010020_CHA_BOS |
| Kevin Gross | WAS | -1.55 | 199010020_SLN_WAS |
Based on accumulated WAA for this season up to 1990-10-03.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 10.49 | Roger Clemens | 228.3 | BOS |
| +005+ | 7.86 | Dave Stewart | 267 | OAK |
| +009+ | 6.98 | Frank Viola | 249.7 | NYN |
| +014+ | 6.46 | Ed Whitson | 228.7 | SDN |
| +015+ | 6.29 | Zane Smith | 215.3 | TOT |
| +019+ | 5.85 | Doug Drabek | 231.3 | PIT |
| +021+ | 5.66 | Steve Farr | 127 | KCA |
| +028+ | 5.18 | Jose Rijo | 197 | CIN |
| +029+ | 5.15 | Ramon Martinez | 234.3 | LAN |
| +032+ | 4.9 | Kevin Appier | 185.7 | KCA |
| +033+ | 4.85 | Bob Welch | 238 | OAK |
| +040+ | 4.36 | Dave Stieb | 208.7 | TOR |
| +046+ | 3.95 | Ben McDonald | 118.7 | BAL |
| +047+ | 3.89 | Norm Charlton | 154.3 | CIN |
| +053+ | 3.58 | Greg Hibbard | 211 | CHA |
| +060+ | 3.39 | Erik Hanson | 236 | SEA |
| +065+ | 3.13 | David Cone | 211.7 | NYN |
| +070+ | 3.02 | Dave Wells | 189 | TOR |
| +074+ | 2.9 | Mike Boddicker | 228 | BOS |
| +080+ | 2.78 | Charlie Leibrandt | 162.3 | ATL |
| +084+ | 2.66 | Scott Erickson | 113 | MIN |
| +089+ | 2.53 | Bobby Witt | 222 | TEX |
| +093+ | 2.48 | Ron Robinson | 179.7 | TOT |
| +095+ | 2.44 | Greg Maddux | 237 | CHN |
| +100+ | 2.35 | Randy Tomlin | 77.7 | PIT |
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