| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Clemens | BOS | 5.92 | 199006030_BOS_CLE |
| Dave Stewart | OAK | 5.08 | 199006030_OAK_KCA |
| Dennis Martinez | WAS | 4.8 | 199006030_WAS_PIT |
| Chris Bosio | MIL | 4.45 | 199006040_BAL_MIL |
| Sid Fernandez | NYN | 3.61 | 199006030_NYN_PHI |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rich Dotson | KCA | -5.36 | 199006050_ANA_KCA |
| Andy Hawkins | NYA | -3.78 | 199006050_NYA_BOS |
| Jim Clancy | HOU | -3.16 | 199006040_HOU_SDN |
| Walt Terrell | PIT | -2.56 | 199006050_CHN_PIT |
| Bruce Ruffin | PHI | -2.38 | 199006050_PHI_SLN |
Based on accumulated WAA for this season up to 1990-06-05.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 3.86 | Jack Armstrong | 76.3 | CIN |
| +006+ | 3.27 | Frank Viola | 71 | NYN |
| +007+ | 3.02 | Bob Welch | 85.3 | OAK |
| +008+ | 2.93 | Tom Browning | 82.3 | CIN |
| +011+ | 2.7 | Bud Black | 77 | CLE |
| +013+ | 2.69 | Roger Clemens | 89 | BOS |
| +014+ | 2.6 | Dave Stewart | 80.7 | OAK |
| +017+ | 2.5 | Teddy Higuera | 52.3 | MIL |
| +020+ | 2.37 | Dennis Martinez | 80 | WAS |
| +023+ | 2.21 | John Tudor | 61.7 | SLN |
| +025+ | 2.15 | Ed Whitson | 74 | SDN |
| +026+ | 2.13 | Dan Petry | 64.7 | DET |
| +027+ | 2.13 | Chris Bosio | 82.7 | MIL |
| +029+ | 2.08 | Tim Leary | 72.7 | NYA |
| +030+ | 2.08 | Mike Morgan | 77.7 | LAN |
| +031+ | 2.07 | Eric King | 62.7 | CHA |
| +032+ | 2.06 | Bret Saberhagen | 78.7 | KCA |
| +033+ | 2.05 | Dave Stieb | 69 | TOR |
| +035+ | 1.92 | Mark Gardner | 56.3 | WAS |
| +043+ | 1.77 | Doug Drabek | 68 | PIT |
| +048+ | 1.72 | Kirk McCaskill | 52 | ANA |
| +054+ | 1.56 | Dennis Cook | 65.7 | PHI |
| +056+ | 1.56 | Neal Heaton | 63.3 | PIT |
| +060+ | 1.43 | Bob Walk | 57.3 | PIT |
| +061+ | 1.41 | Chuck Finley | 65 | ANA |
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