| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Clemens | BOS | 9.85 | 199007080_BOS_TEX |
| Frank Viola | NYN | 8.3 | 199007080_NYN_ATL |
| Dennis Martinez | WAS | 6.68 | 199007080_HOU_WAS |
| Chuck Finley | ANA | 4.03 | 199007070_ANA_MIL |
| Dave Stewart | OAK | 3.77 | 199007080_OAK_CLE |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jack Morris | DET | -6.94 | 199007060_KCA_DET |
| Walt Terrell | PIT | -4.75 | 199007070_PIT_LAN |
| Andy Hawkins | NYA | -3.37 | 199007061_MIN_NYA |
| Jimmy Key | TOR | -2.45 | 199007070_SEA_TOR |
| Sergio Valdez | CLE | -2.16 | 199007062_OAK_CLE |
Based on accumulated WAA for this season up to 1990-07-08.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +004+ | 4.9 | Frank Viola | 123 | NYN |
| +008+ | 4.49 | Roger Clemens | 135.7 | BOS |
| +009+ | 4.47 | Jack Armstrong | 114.7 | CIN |
| +014+ | 3.63 | Chuck Finley | 117 | ANA |
| +018+ | 3.26 | Dennis Martinez | 130 | WAS |
| +020+ | 3.1 | Tom Browning | 129.7 | CIN |
| +021+ | 3.09 | Dave Stewart | 133 | OAK |
| +022+ | 3.06 | Mark Gardner | 95.7 | WAS |
| +023+ | 3.04 | Greg Hibbard | 101.3 | CHA |
| +027+ | 2.87 | Bob Welch | 123.7 | OAK |
| +032+ | 2.76 | Ed Whitson | 121.3 | SDN |
| +033+ | 2.75 | Bret Saberhagen | 121 | KCA |
| +036+ | 2.59 | Teddy Higuera | 67.7 | MIL |
| +038+ | 2.45 | Bud Black | 124.3 | CLE |
| +041+ | 2.38 | Zane Smith | 104.3 | WAS |
| +043+ | 2.35 | John Tudor | 92 | SLN |
| +044+ | 2.33 | Danny Darwin | 57.3 | HOU |
| +052+ | 2.24 | Kirk McCaskill | 80.7 | ANA |
| +058+ | 2.09 | Trevor Wilson | 48.7 | SFN |
| +062+ | 2.02 | Eric King | 99.3 | CHA |
| +066+ | 1.92 | Ramon Martinez | 112.3 | LAN |
| +067+ | 1.88 | Kevin Appier | 77.3 | KCA |
| +078+ | 1.72 | Dave Stieb | 100 | TOR |
| +079+ | 1.7 | Doug Drabek | 109.7 | PIT |
| +081+ | 1.68 | Oil Can Boyd | 96.7 | WAS |
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