| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Clemens | BOS | 6.85 | 199006130_BOS_NYA |
| Dennis Martinez | WAS | 5.42 | 199006130_WAS_PHI |
| Ted Higuera | MIL | 5.22 | 199006130_MIL_BAL |
| Dave Stewart | OAK | 4.94 | 199006140_OAK_CHA |
| Tom Browning | CIN | 4.47 | 199006130_ATL_CIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Walt Terrell | PIT | -2.7 | 199006150_NYN_PIT |
| Bruce Ruffin | PHI | -2.61 | 199006152_CHN_PHI |
| Jim Clancy | HOU | -2.07 | 199006150_HOU_CIN |
| Jim Abbott | ANA | -1.24 | 199006130_KCA_ANA |
| Curt Young | OAK | -1.2 | 199006130_TEX_OAK |
Based on accumulated WAA for this season up to 1990-06-15.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +005+ | 4.14 | Jack Armstrong | 90.3 | CIN |
| +007+ | 3.78 | Tom Browning | 100.3 | CIN |
| +009+ | 3.68 | Frank Viola | 84 | NYN |
| +010+ | 3.58 | Dave Stewart | 97.7 | OAK |
| +011+ | 3.47 | Roger Clemens | 104 | BOS |
| +015+ | 3.16 | Bob Welch | 100 | OAK |
| +020+ | 2.85 | Dave Stieb | 84 | TOR |
| +021+ | 2.84 | Teddy Higuera | 55.7 | MIL |
| +023+ | 2.7 | Dennis Martinez | 92 | WAS |
| +024+ | 2.7 | Chuck Finley | 81 | ANA |
| +025+ | 2.68 | Mark Gardner | 71 | WAS |
| +027+ | 2.63 | Bret Saberhagen | 95 | KCA |
| +028+ | 2.59 | Eric King | 74.7 | CHA |
| +029+ | 2.55 | Bud Black | 93 | CLE |
| +031+ | 2.44 | John Tudor | 68 | SLN |
| +032+ | 2.42 | Doug Drabek | 80.7 | PIT |
| +033+ | 2.36 | Dan Petry | 76 | DET |
| +034+ | 2.32 | Tim Leary | 88 | NYA |
| +040+ | 2.06 | Ed Whitson | 87.3 | SDN |
| +042+ | 2.03 | Kirk McCaskill | 57.3 | ANA |
| +051+ | 1.92 | Neal Heaton | 75.3 | PIT |
| +058+ | 1.79 | Greg Hibbard | 77.3 | CHA |
| +060+ | 1.73 | Ramon Martinez | 78.3 | LAN |
| +062+ | 1.68 | Mike Morgan | 84.7 | LAN |
| +080+ | 1.52 | Mike Boddicker | 87.3 | BOS |
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