| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Clemens | BOS | 9.63 | 199007141_KCA_BOS |
| Dennis Martinez | WAS | 5.86 | 199007141_WAS_ATL |
| Chuck Finley | ANA | 3.95 | 199007150_TOR_ANA |
| Bret Saberhagen | KCA | 3.64 | 199007150_KCA_BOS |
| Ed Whitson | SDN | 3.26 | 199007150_SDN_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Eric Show | SDN | -2.17 | 199007160_SDN_CHN |
| Jeff Robinson | DET | -2.01 | 199007140_TEX_DET |
| Jimmy Key | TOR | -2 | 199007160_TOR_SEA |
| Bert Blyleven | ANA | -1.66 | 199007140_TOR_ANA |
| Jeff Ballard | BAL | -1.52 | 199007160_TEX_BAL |
Based on accumulated WAA for this season up to 1990-07-16.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 5.1 | Roger Clemens | 142.7 | BOS |
| +009+ | 4.56 | Frank Viola | 128 | NYN |
| +012+ | 4.02 | Chuck Finley | 126 | ANA |
| +014+ | 3.89 | Mark Gardner | 104.7 | WAS |
| +016+ | 3.81 | Dennis Martinez | 136 | WAS |
| +018+ | 3.71 | Jack Armstrong | 118 | CIN |
| +020+ | 3.51 | Bob Welch | 131 | OAK |
| +021+ | 3.37 | Dave Stewart | 141 | OAK |
| +022+ | 3.32 | Tom Browning | 137 | CIN |
| +024+ | 3.22 | Greg Hibbard | 108.3 | CHA |
| +025+ | 3.15 | Bud Black | 132 | CLE |
| +026+ | 3.12 | Ed Whitson | 128.3 | SDN |
| +037+ | 2.82 | Bill Swift | 63 | SEA |
| +039+ | 2.75 | Danny Darwin | 64.3 | HOU |
| +042+ | 2.55 | John Tudor | 99 | SLN |
| +043+ | 2.5 | Bret Saberhagen | 125 | KCA |
| +049+ | 2.36 | Trevor Wilson | 56.3 | SFN |
| +053+ | 2.22 | Ramon Martinez | 120.3 | LAN |
| +058+ | 2.12 | Teddy Higuera | 72 | MIL |
| +059+ | 2.12 | Oil Can Boyd | 103.7 | WAS |
| +061+ | 2.07 | Mike Morgan | 123.3 | LAN |
| +062+ | 2.02 | Doug Drabek | 116.7 | PIT |
| +064+ | 1.97 | Kevin Brown | 129.3 | TEX |
| +065+ | 1.96 | Bill Sampen | 51.3 | WAS |
| +070+ | 1.91 | Dave Stieb | 106.7 | TOR |
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