| 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 |
| Bryn Smith | SLN | 3.46 | 199005110_ATL_SLN |
| Jim Deshaies | HOU | 3.28 | 199005110_HOU_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jack Morris | DET | -4.96 | 199005130_TOR_DET |
| Rich Dotson | KCA | -3.81 | 199005120_KCA_CHA |
| Oil Can Boyd | WAS | -3.36 | 199005130_WAS_SDN |
| Andy Hawkins | NYA | -2.01 | 199005110_NYA_SEA |
| Curt Young | OAK | -2 | 199005120_BAL_OAK |
Based on accumulated WAA for this season up to 1990-05-13.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 3.49 | Frank Viola | 51.7 | NYN |
| +002+ | 2.78 | Dennis Cook | 49.3 | PHI |
| +003+ | 2.71 | Bob Welch | 51 | OAK |
| +004+ | 2.57 | Dave Stewart | 49.3 | OAK |
| +007+ | 2.07 | Bud Black | 50 | CLE |
| +008+ | 2.04 | Ed Whitson | 48 | SDN |
| +009+ | 1.95 | Jack Armstrong | 38.3 | CIN |
| +010+ | 1.92 | Chris Bosio | 46.7 | MIL |
| +013+ | 1.89 | Chuck Finley | 47.3 | ANA |
| +017+ | 1.76 | Teddy Higuera | 33.3 | MIL |
| +021+ | 1.68 | Dennis Martinez | 52 | WAS |
| +025+ | 1.58 | Doug Drabek | 45.7 | PIT |
| +026+ | 1.55 | Neal Heaton | 38.3 | PIT |
| +028+ | 1.52 | Bryn Smith | 49.7 | SLN |
| +031+ | 1.49 | Mark Gardner | 33.3 | WAS |
| +033+ | 1.45 | Dave Stieb | 43.7 | TOR |
| +036+ | 1.37 | Tom Gordon | 29.3 | KCA |
| +039+ | 1.27 | Greg Maddux | 44 | CHN |
| XXXXX | 1.21 | Eric King | 35 | CHA |
| XXXXX | 1.13 | Tim Leary | 44.7 | NYA |
| XXXXX | 1.1 | Tom Glavine | 41.3 | ATL |
| XXXXX | 1.09 | Mike Morgan | 41.7 | LAN |
| XXXXX | 1.08 | Dan Petry | 32.7 | DET |
| XXXXX | 1.04 | Jim Deshaies | 42.7 | HOU |
| XXXXX | 1 | Scott Sanderson | 36 | OAK |
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