| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ted Higuera | MIL | 4.25 | 199005060_MIN_MIL |
| Doug Drabek | PIT | 3.93 | 199005062_ATL_PIT |
| Mark Langston | ANA | 3.71 | 199005040_NYA_ANA |
| Dennis Martinez | WAS | 3.71 | 199005050_SFN_WAS |
| John Tudor | SLN | 3.53 | 199005040_CIN_SLN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rich Dotson | KCA | -3.34 | 199005050_CHA_KCA |
| Curt Young | OAK | -2.92 | 199005060_BOS_OAK |
| Bobby Witt | TEX | -2.32 | 199005062_TEX_CLE |
| Andy Hawkins | NYA | -2.27 | 199005060_NYA_ANA |
| Todd Stottlemyre | TOR | -2.16 | 199005050_DET_TOR |
Based on accumulated WAA for this season up to 1990-05-06.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 2.36 | Frank Viola | 36.3 | NYN |
| +002+ | 2.24 | Mike Morgan | 38.7 | LAN |
| +003+ | 2.13 | Jack Armstrong | 33.3 | CIN |
| +004+ | 2.07 | Dave Stewart | 41 | OAK |
| +005+ | 1.95 | Bob Welch | 42 | OAK |
| +007+ | 1.87 | Dennis Cook | 34.3 | PHI |
| +009+ | 1.8 | Ed Whitson | 41 | SDN |
| +010+ | 1.74 | Teddy Higuera | 33.3 | MIL |
| +011+ | 1.62 | Greg Maddux | 36.7 | CHN |
| +013+ | 1.59 | Chris Bosio | 38.7 | MIL |
| +014+ | 1.57 | Mark Gardner | 27.3 | WAS |
| +015+ | 1.55 | John Tudor | 33.3 | SLN |
| +017+ | 1.52 | Bud Black | 34.7 | CLE |
| +020+ | 1.48 | Doug Drabek | 37.3 | PIT |
| +026+ | 1.34 | Pete Smith | 28.3 | ATL |
| +030+ | 1.27 | Dennis Martinez | 43 | WAS |
| +031+ | 1.27 | Chuck Finley | 31 | ANA |
| +033+ | 1.26 | Bryn Smith | 41.7 | SLN |
| XXXXX | 1.22 | Tom Gordon | 23 | KCA |
| XXXXX | 1.18 | Jim Deshaies | 37.7 | HOU |
| XXXXX | 1.07 | Eric King | 29 | CHA |
| XXXXX | 1.06 | Dave Stieb | 30 | TOR |
| XXXXX | 1.05 | Erik Hanson | 30 | SEA |
| XXXXX | 1 | Mike LaCoss | 27.7 | SFN |
| XXXXX | 0.99 | Mark Knudson | 20.3 | MIL |
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