| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Clemens | BOS | 12.03 | 199007300_CHA_BOS |
| Chuck Finley | ANA | 6.04 | 199007310_ANA_MIN |
| Dave Stewart | OAK | 4.3 | 199008010_SEA_OAK |
| John Tudor | SLN | 4.26 | 199007310_SLN_PHI |
| Danny Darwin | HOU | 4.03 | 199007300_HOU_SFN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Andy Hawkins | NYA | -4.73 | 199008010_DET_NYA |
| Jack Morris | DET | -2.93 | 199008010_DET_NYA |
| Bert Blyleven | ANA | -2.75 | 199007300_ANA_MIN |
| Eric Show | SDN | -2.32 | 199007310_ATL_SDN |
| Todd Stottlemyre | TOR | -1.87 | 199007300_TOR_BAL |
Based on accumulated WAA for this season up to 1990-08-01.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 7.04 | Roger Clemens | 167.7 | BOS |
| +005+ | 5.65 | Chuck Finley | 153 | ANA |
| +006+ | 5.38 | Frank Viola | 149 | NYN |
| +009+ | 4.86 | Dave Stewart | 174.3 | OAK |
| +011+ | 4.55 | Mark Gardner | 126.7 | WAS |
| +012+ | 4.54 | Danny Darwin | 88.3 | HOU |
| +015+ | 4.15 | Tom Browning | 159.7 | CIN |
| +021+ | 3.89 | John Tudor | 122.3 | SLN |
| +022+ | 3.88 | Bill Swift | 83.7 | SEA |
| +023+ | 3.86 | Ed Whitson | 149.7 | SDN |
| +024+ | 3.76 | Ramon Martinez | 144.3 | LAN |
| +030+ | 3.45 | Dennis Martinez | 156.3 | WAS |
| +032+ | 3.19 | Doug Drabek | 141 | PIT |
| +041+ | 2.93 | Kirk McCaskill | 104.3 | ANA |
| +042+ | 2.84 | Greg Hibbard | 127 | CHA |
| +044+ | 2.81 | Bob Welch | 147 | OAK |
| +046+ | 2.71 | Dave Stieb | 127.7 | TOR |
| +053+ | 2.5 | Oil Can Boyd | 122.7 | WAS |
| +054+ | 2.49 | Jack Armstrong | 136.7 | CIN |
| +059+ | 2.41 | Kevin Brown | 153.3 | TEX |
| +064+ | 2.34 | Greg Harris | 114.3 | BOS |
| +065+ | 2.3 | Bud Black | 149.7 | CLE |
| +074+ | 2.13 | Dave Wells | 105 | TOR |
| +081+ | 2.05 | Kevin Appier | 107 | KCA |
| +085+ | 2 | Zane Smith | 133.3 | WAS |
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