| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Clemens | BOS | 12.03 | 199007300_CHA_BOS |
| Chuck Finley | ANA | 6.04 | 199007310_ANA_MIN |
| John Tudor | SLN | 4.26 | 199007310_SLN_PHI |
| Danny Darwin | HOU | 4.03 | 199007300_HOU_SFN |
| Ed Whitson | SDN | 3.86 | 199007300_ATL_SDN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bert Blyleven | ANA | -2.75 | 199007300_ANA_MIN |
| David West | MIN | -2.7 | 199007290_OAK_MIN |
| Eric Show | SDN | -2.32 | 199007310_ATL_SDN |
| Todd Stottlemyre | TOR | -1.87 | 199007300_TOR_BAL |
| Jeff Robinson | DET | -1.65 | 199007290_BOS_DET |
Based on accumulated WAA for this season up to 1990-07-31.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 7.02 | Roger Clemens | 167.7 | BOS |
| +005+ | 5.63 | Chuck Finley | 153 | ANA |
| +006+ | 5.4 | Frank Viola | 149 | NYN |
| +010+ | 4.56 | Mark Gardner | 126.7 | WAS |
| +011+ | 4.53 | Danny Darwin | 88.3 | HOU |
| +015+ | 4.13 | Tom Browning | 159.7 | CIN |
| +021+ | 3.87 | Dave Stewart | 163.3 | OAK |
| +020+ | 3.87 | Bill Swift | 83.7 | SEA |
| +022+ | 3.85 | John Tudor | 122.3 | SLN |
| +023+ | 3.84 | Ed Whitson | 149.7 | SDN |
| +024+ | 3.73 | Ramon Martinez | 144.3 | LAN |
| +028+ | 3.47 | Dennis Martinez | 156.3 | WAS |
| +033+ | 3.15 | Doug Drabek | 141 | PIT |
| +037+ | 2.99 | Dave Stieb | 121.7 | TOR |
| +039+ | 2.91 | Kirk McCaskill | 104.3 | ANA |
| +042+ | 2.81 | Bob Welch | 147 | OAK |
| +044+ | 2.81 | Greg Hibbard | 127 | CHA |
| +054+ | 2.52 | Oil Can Boyd | 122.7 | WAS |
| +055+ | 2.47 | Jack Armstrong | 136.7 | CIN |
| +059+ | 2.38 | Kevin Brown | 153.3 | TEX |
| +061+ | 2.32 | Greg Harris | 114.3 | BOS |
| +062+ | 2.28 | Bud Black | 149.7 | CLE |
| +075+ | 2.11 | Dave Wells | 105 | TOR |
| +078+ | 2.09 | Tom Candiotti | 131.7 | CLE |
| +081+ | 2.03 | Kevin Appier | 107 | KCA |
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