| Starter | Tm | Tier | Game |
|---|---|---|---|
| Frank Viola | NYN | 5.56 | 199005120_LAN_NYN |
| Dave Stewart | OAK | 3.66 | 199005140_OAK_MIN |
| Roger Clemens | BOS | 3.61 | 199005140_BOS_KCA |
| Dave Stieb | TOR | 2.15 | 199005130_TOR_DET |
| Chuck Finley | ANA | 1.78 | 199005130_BOS_ANA |
| 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 |
| Curt Young | OAK | -2 | 199005120_BAL_OAK |
| Bobby Witt | TEX | -1.98 | 199005120_CLE_TEX |
Based on accumulated WAA for this season up to 1990-05-14.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 3.51 | Frank Viola | 51.7 | NYN |
| +002+ | 2.79 | Dennis Cook | 49.3 | PHI |
| +003+ | 2.72 | Bob Welch | 51 | OAK |
| +008+ | 2.06 | Bud Black | 50 | CLE |
| +010+ | 2.03 | Ed Whitson | 48 | SDN |
| +013+ | 1.91 | Chris Bosio | 46.7 | MIL |
| +014+ | 1.88 | Chuck Finley | 47.3 | ANA |
| +015+ | 1.85 | Jack Armstrong | 44.3 | CIN |
| +018+ | 1.76 | Teddy Higuera | 33.3 | MIL |
| +019+ | 1.69 | Dennis Martinez | 52 | WAS |
| +021+ | 1.66 | Dave Stewart | 53.3 | OAK |
| +025+ | 1.59 | Doug Drabek | 45.7 | PIT |
| +026+ | 1.56 | Neal Heaton | 38.3 | PIT |
| +029+ | 1.51 | Bryn Smith | 49.7 | SLN |
| +031+ | 1.5 | Mark Gardner | 33.3 | WAS |
| +033+ | 1.43 | Dave Stieb | 43.7 | TOR |
| +036+ | 1.36 | Fernando Valenzuela | 47 | LAN |
| +037+ | 1.35 | Tom Gordon | 29.3 | KCA |
| +039+ | 1.32 | Tom Glavine | 48.3 | ATL |
| +040+ | 1.28 | Greg Maddux | 44 | CHN |
| XXXXX | 1.2 | Eric King | 35 | CHA |
| XXXXX | 1.13 | Tim Leary | 44.7 | NYA |
| XXXXX | 1.09 | Mike Morgan | 41.7 | LAN |
| XXXXX | 1.06 | Dan Petry | 32.7 | DET |
| XXXXX | 1.03 | Jim Deshaies | 42.7 | HOU |
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