| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Clemens | BOS | 10.34 | 199007250_BOS_MIL |
| Frank Viola | NYN | 8.9 | 199007230_NYN_PHI |
| Dennis Martinez | WAS | 5.42 | 199007230_PIT_WAS |
| Dave Stewart | OAK | 4.54 | 199007230_ANA_OAK |
| Ed Whitson | SDN | 3.31 | 199007251_CIN_SDN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Frank Tanana | DET | -5.79 | 199007230_BAL_DET |
| Bruce Ruffin | PHI | -2.01 | 199007230_NYN_PHI |
| Bert Blyleven | ANA | -1.67 | 199007250_ANA_OAK |
| David West | MIN | -1.48 | 199007240_SEA_MIN |
| Todd Stottlemyre | TOR | -1.44 | 199007250_KCA_TOR |
Based on accumulated WAA for this season up to 1990-07-25.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 6.15 | Roger Clemens | 158.7 | BOS |
| +007+ | 4.86 | Frank Viola | 141 | NYN |
| +011+ | 4.39 | Chuck Finley | 135 | ANA |
| +013+ | 4.27 | Dennis Martinez | 151 | WAS |
| +015+ | 4.09 | Bob Welch | 145 | OAK |
| +017+ | 3.97 | Danny Darwin | 80.3 | HOU |
| +019+ | 3.76 | Mark Gardner | 117.7 | WAS |
| +020+ | 3.67 | Ramon Martinez | 136.3 | LAN |
| +023+ | 3.56 | John Tudor | 115 | SLN |
| +025+ | 3.54 | Tom Browning | 151.3 | CIN |
| +026+ | 3.43 | Ed Whitson | 142.7 | SDN |
| +030+ | 3.25 | Dave Stewart | 154.3 | OAK |
| +034+ | 3.09 | Greg Hibbard | 121 | CHA |
| +040+ | 2.81 | Bud Black | 146.3 | CLE |
| +043+ | 2.79 | Dave Wells | 103 | TOR |
| +044+ | 2.76 | Bill Swift | 69.3 | SEA |
| +047+ | 2.68 | Kirk McCaskill | 97.3 | ANA |
| +050+ | 2.55 | Jack Armstrong | 128.7 | CIN |
| +052+ | 2.53 | Doug Drabek | 132 | PIT |
| +061+ | 2.38 | Dave Stieb | 114.7 | TOR |
| +065+ | 2.19 | Oil Can Boyd | 109.7 | WAS |
| +066+ | 2.09 | Kevin Brown | 145.3 | TEX |
| +071+ | 1.98 | Greg Harris | 106.3 | BOS |
| +074+ | 1.93 | Zane Smith | 125.3 | WAS |
| +079+ | 1.91 | Mark Knudson | 121 | MIL |
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