| Starter | Tm | Tier | Game |
|---|---|---|---|
| Frank Viola | NYN | 9.5 | 199007130_NYN_CIN |
| Ted Higuera | MIL | 4.22 | 199007120_MIL_OAK |
| Dave Stewart | OAK | 4.12 | 199007130_MIL_OAK |
| Tom Browning | CIN | 3.42 | 199007130_NYN_CIN |
| Doug Drabek | PIT | 2.99 | 199007130_SDN_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Frank Tanana | DET | -5.02 | 199007130_TEX_DET |
| Andy Hawkins | NYA | -2.4 | 199007120_CHA_NYA |
| Todd Stottlemyre | TOR | -1.61 | 199007130_TOR_ANA |
| David West | MIN | -1.59 | 199007132_MIN_BAL |
| Jim Abbott | ANA | -1.34 | 199007130_TOR_ANA |
Based on accumulated WAA for this season up to 1990-07-13.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +006+ | 4.54 | Frank Viola | 128 | NYN |
| +009+ | 4.48 | Roger Clemens | 135.7 | BOS |
| +011+ | 4.47 | Jack Armstrong | 114.7 | CIN |
| +014+ | 3.88 | Mark Gardner | 104.7 | WAS |
| +016+ | 3.64 | Chuck Finley | 117 | ANA |
| +018+ | 3.39 | Dave Stewart | 141 | OAK |
| +020+ | 3.34 | Tom Browning | 137 | CIN |
| +021+ | 3.25 | Dennis Martinez | 130 | WAS |
| +022+ | 3.23 | Greg Hibbard | 108.3 | CHA |
| +029+ | 2.86 | Bob Welch | 123.7 | OAK |
| +035+ | 2.69 | Ed Whitson | 121.3 | SDN |
| +041+ | 2.44 | Bud Black | 124.3 | CLE |
| +044+ | 2.38 | Zane Smith | 104.3 | WAS |
| +046+ | 2.34 | John Tudor | 92 | SLN |
| +047+ | 2.33 | Danny Darwin | 57.3 | HOU |
| +051+ | 2.22 | Ramon Martinez | 120.3 | LAN |
| +054+ | 2.12 | Teddy Higuera | 72 | MIL |
| +057+ | 2.09 | Trevor Wilson | 48.7 | SFN |
| +060+ | 2.04 | Doug Drabek | 116.7 | PIT |
| +061+ | 2 | Eric King | 99.3 | CHA |
| +065+ | 1.96 | Kevin Brown | 129.3 | TEX |
| +070+ | 1.88 | Kevin Appier | 77.3 | KCA |
| +076+ | 1.75 | Dave Wells | 88.7 | TOR |
| +077+ | 1.74 | Kirk McCaskill | 84.3 | ANA |
| +078+ | 1.73 | Dave Stieb | 100 | TOR |
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