| Starter | Tm | Tier | Game |
|---|---|---|---|
| Chuck Finley | ANA | 3.95 | 199007150_TOR_ANA |
| Bret Saberhagen | KCA | 3.64 | 199007150_KCA_BOS |
| Ed Whitson | SDN | 3.26 | 199007150_SDN_PIT |
| Ted Higuera | MIL | 3.05 | 199007170_MIL_ANA |
| John Tudor | SLN | 3.03 | 199007150_SFN_SLN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jack Morris | DET | -6.52 | 199007170_CHA_DET |
| Andy Hawkins | NYA | -4.43 | 199007170_KCA_NYA |
| Eric Show | SDN | -2.17 | 199007160_SDN_CHN |
| Jimmy Key | TOR | -2 | 199007160_TOR_SEA |
| Jeff Ballard | BAL | -1.52 | 199007160_TEX_BAL |
Based on accumulated WAA for this season up to 1990-07-17.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +004+ | 5.1 | Roger Clemens | 142.7 | BOS |
| +009+ | 4.55 | Frank Viola | 128 | NYN |
| +012+ | 4.02 | Chuck Finley | 126 | ANA |
| +016+ | 3.82 | Dennis Martinez | 136 | WAS |
| +018+ | 3.71 | Jack Armstrong | 118 | CIN |
| +020+ | 3.61 | Mark Gardner | 110.7 | WAS |
| +021+ | 3.51 | Bob Welch | 131 | OAK |
| +022+ | 3.37 | Dave Stewart | 141 | OAK |
| +023+ | 3.32 | Tom Browning | 137 | CIN |
| +025+ | 3.22 | Greg Hibbard | 108.3 | CHA |
| +028+ | 3.15 | Bud Black | 132 | CLE |
| +029+ | 3.14 | Ed Whitson | 128.3 | SDN |
| +037+ | 2.82 | Bill Swift | 63 | SEA |
| +038+ | 2.75 | Danny Darwin | 64.3 | HOU |
| +042+ | 2.55 | John Tudor | 99 | SLN |
| +044+ | 2.5 | Bret Saberhagen | 125 | KCA |
| +049+ | 2.36 | Kirk McCaskill | 91.3 | ANA |
| +051+ | 2.36 | Trevor Wilson | 56.3 | SFN |
| +056+ | 2.23 | Ramon Martinez | 120.3 | LAN |
| +059+ | 2.13 | Oil Can Boyd | 103.7 | WAS |
| +060+ | 2.12 | Dave Wells | 95 | TOR |
| +062+ | 2.09 | Mike Morgan | 123.3 | LAN |
| +066+ | 2.02 | Doug Drabek | 116.7 | PIT |
| +071+ | 1.93 | Dave Stieb | 106.7 | TOR |
| +079+ | 1.78 | Kevin Brown | 136.3 | TEX |
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