| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Clemens | BOS | 6.65 | 199006080_CLE_BOS |
| Frank Viola | NYN | 6.16 | 199006060_WAS_NYN |
| Dennis Martinez | WAS | 5.26 | 199006080_SLN_WAS |
| Ted Higuera | MIL | 4.94 | 199006060_BAL_MIL |
| Doug Drabek | PIT | 4.53 | 199006060_CHN_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jack Morris | DET | -5.84 | 199006060_DET_CLE |
| Bobby Witt | TEX | -2.75 | 199006070_OAK_TEX |
| Todd Stottlemyre | TOR | -2.16 | 199006070_MIN_TOR |
| Curt Young | OAK | -1.9 | 199006080_KCA_OAK |
| Derek Lilliquist | ATL | -1.85 | 199006080_SFN_ATL |
Based on accumulated WAA for this season up to 1990-06-08.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +004+ | 3.88 | Jack Armstrong | 76.3 | CIN |
| +005+ | 3.75 | Tom Browning | 91.3 | CIN |
| +006+ | 3.74 | Frank Viola | 78 | NYN |
| +010+ | 3.09 | Bob Welch | 85.3 | OAK |
| +012+ | 2.96 | Roger Clemens | 96 | BOS |
| +013+ | 2.8 | Teddy Higuera | 55.3 | MIL |
| +016+ | 2.67 | Dave Stewart | 80.7 | OAK |
| +018+ | 2.57 | Dennis Martinez | 86 | WAS |
| +020+ | 2.52 | Bret Saberhagen | 87.7 | KCA |
| +023+ | 2.36 | Bud Black | 84 | CLE |
| +024+ | 2.29 | Doug Drabek | 75 | PIT |
| +025+ | 2.26 | John Tudor | 61.7 | SLN |
| +027+ | 2.18 | Chris Bosio | 82.7 | MIL |
| +029+ | 2.17 | Dan Petry | 64.7 | DET |
| +031+ | 2.14 | Mike Morgan | 77.7 | LAN |
| +032+ | 2.13 | Tim Leary | 79.3 | NYA |
| +033+ | 2.11 | Eric King | 62.7 | CHA |
| +034+ | 2.1 | Dave Stieb | 69 | TOR |
| +038+ | 1.97 | Chuck Finley | 73 | ANA |
| +039+ | 1.97 | Mark Gardner | 56.3 | WAS |
| +043+ | 1.88 | Neal Heaton | 68.3 | PIT |
| +045+ | 1.85 | Ed Whitson | 79.3 | SDN |
| +047+ | 1.75 | Kirk McCaskill | 52 | ANA |
| +080+ | 1.33 | Greg Hibbard | 63.3 | CHA |
| +086+ | 1.31 | Ramon Martinez | 71 | LAN |
_