| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Clemens | BOS | 10.46 | 199007201_BOS_KCA |
| Chuck Finley | ANA | 4.55 | 199007210_CLE_ANA |
| Ed Whitson | SDN | 3.93 | 199007200_SDN_SLN |
| John Tudor | SLN | 3.21 | 199007200_SDN_SLN |
| Danny Darwin | HOU | 2.32 | 199007200_WAS_HOU |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Andy Hawkins | NYA | -7.15 | 199007220_NYA_MIN |
| Jack Morris | DET | -6.61 | 199007220_DET_TEX |
| Eric Show | SDN | -2.71 | 199007210_SDN_SLN |
| Storm Davis | KCA | -1.83 | 199007220_BOS_KCA |
| Bert Blyleven | ANA | -1.41 | 199007200_CLE_ANA |
Based on accumulated WAA for this season up to 1990-07-22.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +006+ | 5.25 | Roger Clemens | 149.7 | BOS |
| +007+ | 5.07 | Frank Viola | 135 | NYN |
| +011+ | 4.3 | Chuck Finley | 135 | ANA |
| +015+ | 3.91 | Bob Welch | 139 | OAK |
| +017+ | 3.71 | Mark Gardner | 117.7 | WAS |
| +019+ | 3.58 | Dave Stewart | 149.3 | OAK |
| +021+ | 3.49 | Jack Armstrong | 124 | CIN |
| +022+ | 3.4 | Dennis Martinez | 142 | WAS |
| +025+ | 3.31 | Danny Darwin | 71.3 | HOU |
| +028+ | 3.21 | Tom Browning | 144.3 | CIN |
| +035+ | 2.91 | Ed Whitson | 135.3 | SDN |
| +037+ | 2.79 | Ramon Martinez | 127.3 | LAN |
| +040+ | 2.72 | Bill Swift | 69.3 | SEA |
| +041+ | 2.69 | John Tudor | 106 | SLN |
| +043+ | 2.61 | Greg Hibbard | 114 | CHA |
| +049+ | 2.37 | Dave Stieb | 114.7 | TOR |
| +053+ | 2.29 | Kirk McCaskill | 91.3 | ANA |
| +059+ | 2.22 | Doug Drabek | 124.7 | PIT |
| +062+ | 2.15 | Oil Can Boyd | 109.7 | WAS |
| +064+ | 2.14 | Eric King | 111 | CHA |
| +066+ | 2.08 | Kevin Appier | 94 | KCA |
| +067+ | 2.06 | Dave Wells | 95 | TOR |
| +074+ | 1.89 | Bud Black | 137.3 | CLE |
| +088+ | 1.72 | Norm Charlton | 61.7 | CIN |
| +092+ | 1.66 | Kevin Brown | 136.3 | TEX |
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