| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Clemens | BOS | 5.2 | 199005290_BOS_TEX |
| Dave Stewart | OAK | 4.11 | 199005290_TOR_OAK |
| Tim Leary | NYA | 2.57 | 199005280_NYA_CHA |
| Tim Belcher | LAN | 2.41 | 199005280_LAN_PIT |
| Jose Rijo | CIN | 2.4 | 199005270_CIN_WAS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jack Morris | DET | -4.96 | 199005270_CHA_DET |
| Bobby Witt | TEX | -2.23 | 199005270_BAL_TEX |
| Melido Perez | CHA | -1.89 | 199005270_CHA_DET |
| Jim Abbott | ANA | -1.62 | 199005280_CLE_ANA |
| David West | MIN | -1.45 | 199005280_BAL_MIN |
Based on accumulated WAA for this season up to 1990-05-29.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 3.53 | Dave Stewart | 75.3 | OAK |
| +003+ | 3.5 | Bud Black | 74.3 | CLE |
| +007+ | 3.31 | Jack Armstrong | 61.3 | CIN |
| +008+ | 3.29 | Bob Welch | 72.7 | OAK |
| +010+ | 2.53 | Frank Viola | 63 | NYN |
| +013+ | 2.4 | Chris Bosio | 72.3 | MIL |
| +015+ | 2.35 | Roger Clemens | 81 | BOS |
| +020+ | 2.23 | Tom Browning | 75.3 | CIN |
| +021+ | 2.22 | Tom Glavine | 62.3 | ATL |
| +022+ | 2.2 | Tim Leary | 67.7 | NYA |
| +023+ | 2.17 | Chuck Finley | 62.3 | ANA |
| +024+ | 2.17 | Dennis Martinez | 73 | WAS |
| +027+ | 2.11 | Dave Stieb | 63 | TOR |
| +032+ | 1.89 | Mark Gardner | 51.3 | WAS |
| +034+ | 1.77 | Doug Drabek | 61 | PIT |
| +033+ | 1.77 | Dennis Cook | 58.7 | PHI |
| +035+ | 1.75 | Dan Petry | 51.7 | DET |
| +037+ | 1.72 | Greg Hibbard | 52 | CHA |
| +040+ | 1.62 | Bret Saberhagen | 71.7 | KCA |
| +042+ | 1.61 | John Tudor | 55 | SLN |
| +044+ | 1.57 | Eric King | 55 | CHA |
| +049+ | 1.51 | Sid Fernandez | 56.3 | NYN |
| +060+ | 1.38 | Bobby Ojeda | 38.7 | NYN |
| +062+ | 1.35 | Willie Blair | 24.3 | TOR |
| +066+ | 1.34 | Ed Whitson | 65 | SDN |
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