| Starter | Tm | Tier | Game |
|---|---|---|---|
| Frank Viola | NYN | 5.56 | 199005120_LAN_NYN |
| Doug Drabek | PIT | 4.69 | 199005110_HOU_PIT |
| Greg Maddux | CHN | 4.07 | 199005110_CHN_CIN |
| Dennis Martinez | WAS | 3.96 | 199005100_LAN_WAS |
| Bryn Smith | SLN | 3.46 | 199005110_ATL_SLN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rich Dotson | KCA | -3.81 | 199005120_KCA_CHA |
| Andy Hawkins | NYA | -2.01 | 199005110_NYA_SEA |
| Curt Young | OAK | -2 | 199005120_BAL_OAK |
| Bobby Witt | TEX | -1.98 | 199005120_CLE_TEX |
| Melido Perez | CHA | -1.71 | 199005120_KCA_CHA |
Based on accumulated WAA for this season up to 1990-05-12.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 3.48 | Frank Viola | 51.7 | NYN |
| +002+ | 2.69 | Bob Welch | 51 | OAK |
| +003+ | 2.54 | Dave Stewart | 49.3 | OAK |
| +005+ | 2.16 | Dennis Cook | 40.3 | PHI |
| +007+ | 2.06 | Bud Black | 50 | CLE |
| +006+ | 2.06 | Chuck Finley | 40 | ANA |
| +008+ | 2.02 | Ed Whitson | 48 | SDN |
| +010+ | 1.93 | Jack Armstrong | 38.3 | CIN |
| +014+ | 1.89 | Chris Bosio | 46.7 | MIL |
| +019+ | 1.74 | Teddy Higuera | 33.3 | MIL |
| +020+ | 1.66 | Dennis Martinez | 52 | WAS |
| +023+ | 1.57 | Doug Drabek | 45.7 | PIT |
| +026+ | 1.54 | Neal Heaton | 38.3 | PIT |
| +027+ | 1.53 | Dave Stieb | 37.7 | TOR |
| +028+ | 1.5 | Bryn Smith | 49.7 | SLN |
| +029+ | 1.48 | Mark Gardner | 33.3 | WAS |
| +035+ | 1.35 | Tom Gordon | 29.3 | KCA |
| XXXXX | 1.24 | Greg Maddux | 44 | CHN |
| XXXXX | 1.19 | Eric King | 35 | CHA |
| XXXXX | 1.1 | Tim Leary | 44.7 | NYA |
| XXXXX | 1.09 | Tom Glavine | 41.3 | ATL |
| XXXXX | 1.08 | Mike Morgan | 41.7 | LAN |
| XXXXX | 1.07 | Dan Petry | 32.7 | DET |
| XXXXX | 1.01 | Jim Deshaies | 42.7 | HOU |
| XXXXX | 1 | Bill Sampen | 16 | WAS |
_