| Starter | Tm | Tier | Game |
|---|---|---|---|
| Frank Viola | NYN | 5.91 | 199005240_SDN_NYN |
| Dennis Martinez | WAS | 4.34 | 199005250_CIN_WAS |
| Roger Clemens | BOS | 4.28 | 199005240_KCA_BOS |
| Chris Bosio | MIL | 4.21 | 199005250_MIL_ANA |
| Dave Stewart | OAK | 3.21 | 199005240_MIL_OAK |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Walt Terrell | PIT | -2.14 | 199005250_SFN_PIT |
| Bruce Ruffin | PHI | -1.9 | 199005240_ATL_PHI |
| Frank Tanana | DET | -1.8 | 199005240_TEX_DET |
| Oil Can Boyd | WAS | -1.59 | 199005230_SDN_WAS |
| Jay Tibbs | BAL | -1.37 | 199005240_CHA_BAL |
Based on accumulated WAA for this season up to 1990-05-25.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +004+ | 3.29 | Bob Welch | 65.7 | OAK |
| +005+ | 3.28 | Jack Armstrong | 61.3 | CIN |
| +007+ | 2.93 | Dave Stewart | 66.3 | OAK |
| +009+ | 2.75 | Bud Black | 66.3 | CLE |
| +010+ | 2.5 | Frank Viola | 63 | NYN |
| +011+ | 2.35 | Chris Bosio | 72.3 | MIL |
| +013+ | 2.22 | Tom Glavine | 62.3 | ATL |
| +016+ | 2.16 | Dennis Martinez | 73 | WAS |
| +015+ | 2.16 | Mark Gardner | 47.3 | WAS |
| +017+ | 2.09 | Teddy Higuera | 46.3 | MIL |
| +024+ | 1.86 | Chuck Finley | 54 | ANA |
| +027+ | 1.84 | Tim Leary | 59.7 | NYA |
| +028+ | 1.8 | Roger Clemens | 73 | BOS |
| +029+ | 1.79 | Doug Drabek | 52 | PIT |
| +030+ | 1.77 | Dennis Cook | 58.7 | PHI |
| +032+ | 1.73 | Dan Petry | 51.7 | DET |
| +033+ | 1.72 | Greg Hibbard | 52 | CHA |
| +035+ | 1.71 | Tom Browning | 67.3 | CIN |
| +041+ | 1.63 | Bob Walk | 45.7 | PIT |
| +045+ | 1.5 | Mark Knudson | 46.7 | MIL |
| +055+ | 1.35 | Willie Blair | 24.3 | TOR |
| +060+ | 1.3 | Mike Witt | 33.3 | TOT |
| +061+ | 1.29 | Dave Stieb | 54 | TOR |
| +067+ | 1.26 | Jose DeLeon | 53.7 | SLN |
| XXXXX | 1.25 | Neal Heaton | 50.7 | PIT |
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