| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Clemens | BOS | 6.36 | 199006230_BAL_BOS |
| Tom Browning | CIN | 4.62 | 199006230_LAN_CIN |
| Frank Viola | NYN | 4.43 | 199006220_PHI_NYN |
| Bret Saberhagen | KCA | 3.9 | 199006220_KCA_MIN |
| Doug Drabek | PIT | 3.41 | 199006230_PIT_WAS |
| 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 |
| Bobby Witt | TEX | -2.1 | 199006230_SEA_TEX |
| John Smoltz | ATL | -1.79 | 199006210_CIN_ATL |
Based on accumulated WAA for this season up to 1990-06-23.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +006+ | 4.02 | Jack Armstrong | 94 | CIN |
| +008+ | 3.78 | Roger Clemens | 114.7 | BOS |
| +011+ | 3.49 | Bob Welch | 106 | OAK |
| +012+ | 3.41 | Dave Stieb | 91.7 | TOR |
| +014+ | 3.38 | Eric King | 83.7 | CHA |
| +015+ | 3.36 | Chuck Finley | 95.3 | ANA |
| +016+ | 3.32 | Tom Browning | 112 | CIN |
| +018+ | 3.3 | Dennis Martinez | 101 | WAS |
| +020+ | 3.19 | Frank Viola | 97.3 | NYN |
| +021+ | 3.1 | Mark Gardner | 78 | WAS |
| +027+ | 2.74 | Dave Stewart | 104.7 | OAK |
| +030+ | 2.63 | Bret Saberhagen | 109 | KCA |
| +033+ | 2.5 | Ramon Martinez | 94 | LAN |
| +044+ | 2.17 | Ed Whitson | 100.3 | SDN |
| +047+ | 2.09 | Kevin Brown | 103.7 | TEX |
| +050+ | 2.04 | John Tudor | 73 | SLN |
| +054+ | 1.97 | Greg Hibbard | 82 | CHA |
| +056+ | 1.95 | Doug Drabek | 91.7 | PIT |
| +057+ | 1.94 | Charlie Leibrandt | 32 | ATL |
| +062+ | 1.85 | Kirk McCaskill | 62.3 | ANA |
| +063+ | 1.83 | Neal Heaton | 81.3 | PIT |
| +071+ | 1.75 | Mike Morgan | 99.7 | LAN |
| +073+ | 1.72 | Mike Boddicker | 103.7 | BOS |
| +078+ | 1.65 | Andy Benes | 87.7 | SDN |
| +086+ | 1.53 | Mark Langston | 98.3 | ANA |
_