| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Clemens | BOS | 6.85 | 199006130_BOS_NYA |
| Frank Viola | NYN | 6.77 | 199006110_NYN_CHN |
| Dennis Martinez | WAS | 5.42 | 199006130_WAS_PHI |
| Ted Higuera | MIL | 5.22 | 199006130_MIL_BAL |
| Doug Drabek | PIT | 5.14 | 199006110_PIT_SLN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bobby Witt | TEX | -1.87 | 199006120_TEX_OAK |
| Todd Stottlemyre | TOR | -1.61 | 199006120_TOR_MIN |
| Matt Young | SEA | -1.52 | 199006110_CHA_SEA |
| Jim Abbott | ANA | -1.24 | 199006130_KCA_ANA |
| Curt Young | OAK | -1.2 | 199006130_TEX_OAK |
Based on accumulated WAA for this season up to 1990-06-13.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +004+ | 4.08 | Jack Armstrong | 82.7 | CIN |
| +005+ | 3.78 | Tom Browning | 100.3 | CIN |
| +007+ | 3.68 | Frank Viola | 84 | NYN |
| +010+ | 3.47 | Dave Stewart | 89.7 | OAK |
| +012+ | 3.46 | Roger Clemens | 104 | BOS |
| +014+ | 3.35 | Bob Welch | 93 | OAK |
| +018+ | 2.84 | Teddy Higuera | 55.7 | MIL |
| +021+ | 2.71 | Dennis Martinez | 92 | WAS |
| +020+ | 2.71 | Chuck Finley | 81 | ANA |
| +022+ | 2.63 | Bret Saberhagen | 95 | KCA |
| +026+ | 2.55 | Bud Black | 93 | CLE |
| +028+ | 2.44 | John Tudor | 68 | SLN |
| +029+ | 2.43 | Dave Stieb | 77 | TOR |
| +030+ | 2.42 | Doug Drabek | 80.7 | PIT |
| +031+ | 2.33 | Tim Leary | 88 | NYA |
| +033+ | 2.29 | Eric King | 69 | CHA |
| +038+ | 2.13 | Ed Whitson | 87.3 | SDN |
| +041+ | 2.04 | Kirk McCaskill | 57.3 | ANA |
| +048+ | 1.93 | Neal Heaton | 75.3 | PIT |
| +049+ | 1.92 | Dan Petry | 68.7 | DET |
| +053+ | 1.84 | Chris Bosio | 90.3 | MIL |
| +055+ | 1.79 | Greg Hibbard | 70.3 | CHA |
| +054+ | 1.79 | Ramon Martinez | 78.3 | LAN |
| +058+ | 1.75 | Mike Morgan | 84.7 | LAN |
| +074+ | 1.51 | Mike Boddicker | 87.3 | BOS |
_