| 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 |
| Greg Maddux | CHN | 3.32 | 199005160_CHN_ATL |
| Ed Whitson | SDN | 3.11 | 199005160_PHI_SDN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jack Morris | DET | -5.04 | 199005170_DET_TEX |
| Todd Stottlemyre | TOR | -2.22 | 199005160_SEA_TOR |
| Randy Johnson | SEA | -1.35 | 199005170_SEA_TOR |
| Terry Mulholland | PHI | -1.26 | 199005150_PHI_SDN |
| Derek Lilliquist | ATL | -1.11 | 199005170_PIT_ATL |
Based on accumulated WAA for this season up to 1990-05-17.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 3.52 | Frank Viola | 51.7 | NYN |
| +003+ | 2.79 | Dennis Cook | 49.3 | PHI |
| +005+ | 2.73 | Bob Welch | 58 | OAK |
| +009+ | 2.06 | Bud Black | 50 | CLE |
| +010+ | 1.92 | Chuck Finley | 47.3 | ANA |
| +013+ | 1.82 | Jack Armstrong | 44.3 | CIN |
| +015+ | 1.76 | Chris Bosio | 54.3 | MIL |
| +016+ | 1.73 | Ed Whitson | 54 | SDN |
| +017+ | 1.72 | Mark Gardner | 40.3 | WAS |
| +018+ | 1.69 | Dave Stewart | 53.3 | OAK |
| +025+ | 1.62 | Dennis Martinez | 58 | WAS |
| +027+ | 1.58 | Doug Drabek | 45.7 | PIT |
| +029+ | 1.55 | Teddy Higuera | 40.3 | MIL |
| +032+ | 1.49 | Mike Morgan | 50.7 | LAN |
| +033+ | 1.48 | Bryn Smith | 56.3 | SLN |
| +035+ | 1.46 | Neal Heaton | 44.3 | PIT |
| +036+ | 1.42 | Dave Stieb | 43.7 | TOR |
| +041+ | 1.36 | Fernando Valenzuela | 47 | LAN |
| +045+ | 1.31 | Tom Glavine | 48.3 | ATL |
| +051+ | 1.26 | Tom Gordon | 35.3 | KCA |
| XXXXX | 1.22 | Kevin Tapani | 48.3 | MIN |
| XXXXX | 1.17 | Dan Petry | 38.7 | DET |
| XXXXX | 1.13 | Scott Sanderson | 42 | OAK |
| XXXXX | 1.12 | Tim Leary | 44.7 | NYA |
| XXXXX | 1.11 | Eric King | 41 | CHA |
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