| Starter | Tm | Tier | Game |
|---|---|---|---|
| Walt Terrell | PIT | -3.94 | 199006270_PHI_PIT |
| Bobby Witt | TEX | -2.58 | 199006280_TEX_MIN |
| Jim Abbott | ANA | -2 | 199006290_ANA_CLE |
| Mike Dunne | SDN | -1.5 | 199006290_CHN_SDN |
| John Smoltz | ATL | -1.36 | 199006270_LAN_ATL |
Based on accumulated WAA for this season up to 1990-06-29.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +005+ | 4.3 | Jack Armstrong | 102 | CIN |
| +009+ | 3.87 | Roger Clemens | 122.7 | BOS |
| +010+ | 3.81 | Dave Stewart | 123.7 | OAK |
| +014+ | 3.61 | Eric King | 91 | CHA |
| +015+ | 3.56 | Bob Welch | 114 | OAK |
| +016+ | 3.55 | Frank Viola | 106.3 | NYN |
| +017+ | 3.33 | Dennis Martinez | 115 | WAS |
| +019+ | 3.14 | Ramon Martinez | 103 | LAN |
| +022+ | 3.03 | Mark Gardner | 84 | WAS |
| +025+ | 2.91 | Chuck Finley | 99.7 | ANA |
| +028+ | 2.71 | Greg Hibbard | 90.3 | CHA |
| +030+ | 2.63 | Bret Saberhagen | 115.7 | KCA |
| +034+ | 2.49 | Ed Whitson | 106.3 | SDN |
| +035+ | 2.48 | Kirk McCaskill | 69.3 | ANA |
| +036+ | 2.45 | John Tudor | 80 | SLN |
| +038+ | 2.44 | Tom Browning | 116.3 | CIN |
| +049+ | 2.21 | Kevin Brown | 111.7 | TEX |
| +050+ | 2.2 | Dave Stieb | 91.7 | TOR |
| +069+ | 1.83 | Mark Langston | 106.3 | ANA |
| +074+ | 1.72 | Mike Boddicker | 110.7 | BOS |
| +075+ | 1.71 | Mike Morgan | 105.7 | LAN |
| +086+ | 1.61 | Charlie Leibrandt | 40 | ATL |
| +087+ | 1.59 | Greg Harris | 81.7 | BOS |
| +089+ | 1.58 | Doug Drabek | 96.7 | PIT |
| +097+ | 1.43 | Tom Gordon | 82 | KCA |
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