| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dennis Martinez | WAS | 4.58 | 199005150_WAS_LAN |
| Ted Higuera | MIL | 3.97 | 199005160_ANA_MIL |
| Bryn Smith | SLN | 3.75 | 199005160_HOU_SLN |
| Dave Stewart | OAK | 3.66 | 199005140_OAK_MIN |
| Roger Clemens | BOS | 3.61 | 199005140_BOS_KCA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Todd Stottlemyre | TOR | -2.22 | 199005160_SEA_TOR |
| Storm Davis | KCA | -1.9 | 199005140_BOS_KCA |
| Walt Terrell | PIT | -1.85 | 199005140_PIT_CIN |
| Frank Tanana | DET | -1.74 | 199005140_TOR_DET |
| Terry Mulholland | PHI | -1.26 | 199005150_PHI_SDN |
Based on accumulated WAA for this season up to 1990-05-16.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 3.51 | Frank Viola | 51.7 | NYN |
| +002+ | 2.78 | Dennis Cook | 49.3 | PHI |
| +005+ | 2.72 | Bob Welch | 58 | OAK |
| +009+ | 2.05 | Bud Black | 50 | CLE |
| +011+ | 1.9 | Chuck Finley | 47.3 | ANA |
| +013+ | 1.82 | Jack Armstrong | 44.3 | CIN |
| +016+ | 1.76 | Chris Bosio | 54.3 | MIL |
| +018+ | 1.72 | Ed Whitson | 54 | SDN |
| +019+ | 1.72 | Mark Gardner | 40.3 | WAS |
| +021+ | 1.68 | Dave Stewart | 53.3 | OAK |
| +026+ | 1.62 | Dennis Martinez | 58 | WAS |
| +027+ | 1.57 | Doug Drabek | 45.7 | PIT |
| +029+ | 1.54 | Neal Heaton | 38.3 | PIT |
| +028+ | 1.54 | Teddy Higuera | 40.3 | MIL |
| +032+ | 1.48 | Mike Morgan | 50.7 | LAN |
| +033+ | 1.47 | Bryn Smith | 56.3 | SLN |
| +036+ | 1.41 | Dave Stieb | 43.7 | TOR |
| +041+ | 1.35 | Fernando Valenzuela | 47 | LAN |
| +045+ | 1.31 | Tom Glavine | 48.3 | ATL |
| +049+ | 1.26 | Tom Gordon | 35.3 | KCA |
| XXXXX | 1.2 | Eric King | 35 | CHA |
| XXXXX | 1.18 | Dan Petry | 38.7 | DET |
| XXXXX | 1.12 | Scott Sanderson | 42 | OAK |
| XXXXX | 1.12 | Tim Leary | 44.7 | NYA |
| XXXXX | 0.97 | Mark Knudson | 31.7 | MIL |
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