| Starter | Tm | Tier | Game |
|---|---|---|---|
| Frank Viola | NYN | 4.43 | 199006220_PHI_NYN |
| Bret Saberhagen | KCA | 3.9 | 199006220_KCA_MIN |
| Dave Stieb | TOR | 3.74 | 199006200_BOS_TOR |
| Bob Welch | OAK | 3.45 | 199006200_OAK_DET |
| Mark Langston | ANA | 3.2 | 199006200_ANA_CHA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jack Morris | DET | -5.22 | 199006210_DET_ANA |
| Andy Hawkins | NYA | -4.62 | 199006210_NYA_TOR |
| Walt Terrell | PIT | -4.1 | 199006220_PIT_WAS |
| Jim Clancy | HOU | -3.27 | 199006200_HOU_LAN |
| John Smoltz | ATL | -1.79 | 199006210_CIN_ATL |
Based on accumulated WAA for this season up to 1990-06-22.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +006+ | 4 | Jack Armstrong | 94 | CIN |
| +008+ | 3.9 | Tom Browning | 107 | CIN |
| +011+ | 3.47 | Bob Welch | 106 | OAK |
| +012+ | 3.39 | Dave Stieb | 91.7 | TOR |
| +013+ | 3.37 | Eric King | 83.7 | CHA |
| +014+ | 3.34 | Chuck Finley | 95.3 | ANA |
| +016+ | 3.28 | Dennis Martinez | 101 | WAS |
| +017+ | 3.17 | Frank Viola | 97.3 | NYN |
| +019+ | 3.09 | Mark Gardner | 78 | WAS |
| +023+ | 2.96 | Roger Clemens | 105.7 | BOS |
| +028+ | 2.72 | Dave Stewart | 104.7 | OAK |
| +030+ | 2.6 | Bret Saberhagen | 109 | KCA |
| +033+ | 2.47 | Ramon Martinez | 94 | LAN |
| +041+ | 2.24 | Ed Whitson | 94.3 | SDN |
| +046+ | 2.11 | Kevin Brown | 103.7 | TEX |
| +049+ | 2.04 | Tim Leary | 96 | NYA |
| +050+ | 2.03 | John Tudor | 73 | SLN |
| +054+ | 1.96 | Greg Hibbard | 82 | CHA |
| +056+ | 1.94 | Charlie Leibrandt | 32 | ATL |
| +061+ | 1.84 | Kirk McCaskill | 62.3 | ANA |
| +062+ | 1.81 | Neal Heaton | 81.3 | PIT |
| +066+ | 1.72 | Mike Morgan | 99.7 | LAN |
| +067+ | 1.72 | Mike Boddicker | 103.7 | BOS |
| +077+ | 1.63 | Andy Benes | 87.7 | SDN |
| +080+ | 1.58 | Doug Drabek | 85.7 | PIT |
_