| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Clemens | BOS | 10.34 | 199007250_BOS_MIL |
| Frank Viola | NYN | 7.43 | 199007270_SLN_NYN |
| Chuck Finley | ANA | 4.92 | 199007260_ANA_OAK |
| Ed Whitson | SDN | 3.31 | 199007251_CIN_SDN |
| John Tudor | SLN | 3.24 | 199007250_CHN_SLN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Andy Hawkins | NYA | -6.81 | 199007271_NYA_CLE |
| Jack Morris | DET | -4.75 | 199007270_BOS_DET |
| Eric Show | SDN | -2.72 | 199007260_HOU_SDN |
| Bert Blyleven | ANA | -1.67 | 199007250_ANA_OAK |
| Todd Stottlemyre | TOR | -1.44 | 199007250_KCA_TOR |
Based on accumulated WAA for this season up to 1990-07-27.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 6.14 | Roger Clemens | 158.7 | BOS |
| +006+ | 5.35 | Frank Viola | 149 | NYN |
| +008+ | 4.96 | Chuck Finley | 144 | ANA |
| +009+ | 4.53 | Mark Gardner | 126.7 | WAS |
| +015+ | 4.21 | Dennis Martinez | 151 | WAS |
| +016+ | 4.05 | Bob Welch | 145 | OAK |
| +018+ | 3.97 | Danny Darwin | 80.3 | HOU |
| +021+ | 3.6 | Ramon Martinez | 136.3 | LAN |
| +022+ | 3.56 | John Tudor | 115 | SLN |
| +026+ | 3.41 | Ed Whitson | 142.7 | SDN |
| +029+ | 3.21 | Dave Stewart | 154.3 | OAK |
| +033+ | 3.12 | Bill Swift | 75.7 | SEA |
| +034+ | 3.07 | Greg Hibbard | 121 | CHA |
| +037+ | 2.99 | Dave Stieb | 121.7 | TOR |
| +045+ | 2.79 | Bud Black | 146.3 | CLE |
| +046+ | 2.78 | Dave Wells | 103 | TOR |
| +050+ | 2.65 | Kirk McCaskill | 97.3 | ANA |
| +053+ | 2.55 | Jack Armstrong | 128.7 | CIN |
| +054+ | 2.51 | Doug Drabek | 132 | PIT |
| +063+ | 2.37 | Oil Can Boyd | 116.7 | WAS |
| +070+ | 2.09 | Kevin Brown | 145.3 | TEX |
| +076+ | 1.98 | Greg Harris | 106.3 | BOS |
| +083+ | 1.9 | Mark Knudson | 121 | MIL |
| +086+ | 1.89 | Zane Smith | 125.3 | WAS |
| +085+ | 1.89 | Norm Charlton | 67.7 | CIN |
_