| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Clemens | BOS | 9.63 | 199007141_KCA_BOS |
| Frank Viola | NYN | 9.5 | 199007130_NYN_CIN |
| Dennis Martinez | WAS | 5.86 | 199007141_WAS_ATL |
| Dave Stewart | OAK | 4.12 | 199007130_MIL_OAK |
| Chuck Finley | ANA | 3.95 | 199007150_TOR_ANA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Frank Tanana | DET | -5.02 | 199007130_TEX_DET |
| Bert Blyleven | ANA | -1.66 | 199007140_TOR_ANA |
| Todd Stottlemyre | TOR | -1.61 | 199007130_TOR_ANA |
| David West | MIN | -1.59 | 199007132_MIN_BAL |
| Bobby Witt | TEX | -0.77 | 199007130_TEX_DET |
Based on accumulated WAA for this season up to 1990-07-15.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 5.14 | Roger Clemens | 142.7 | BOS |
| +008+ | 4.57 | Frank Viola | 128 | NYN |
| +012+ | 4.05 | Chuck Finley | 126 | ANA |
| +014+ | 3.9 | Mark Gardner | 104.7 | WAS |
| +017+ | 3.83 | Dennis Martinez | 136 | WAS |
| +018+ | 3.74 | Jack Armstrong | 118 | CIN |
| +019+ | 3.55 | Bob Welch | 131 | OAK |
| +020+ | 3.41 | Dave Stewart | 141 | OAK |
| +023+ | 3.36 | Tom Browning | 137 | CIN |
| +024+ | 3.24 | Greg Hibbard | 108.3 | CHA |
| +025+ | 3.17 | Bud Black | 132 | CLE |
| +026+ | 3.14 | Ed Whitson | 128.3 | SDN |
| +036+ | 2.84 | Bill Swift | 63 | SEA |
| +038+ | 2.77 | Danny Darwin | 64.3 | HOU |
| +042+ | 2.57 | John Tudor | 99 | SLN |
| +043+ | 2.52 | Bret Saberhagen | 125 | KCA |
| +045+ | 2.4 | Zane Smith | 104.3 | WAS |
| +047+ | 2.37 | Trevor Wilson | 56.3 | SFN |
| +054+ | 2.25 | Ramon Martinez | 120.3 | LAN |
| +058+ | 2.14 | Teddy Higuera | 72 | MIL |
| +059+ | 2.13 | Oil Can Boyd | 103.7 | WAS |
| +061+ | 2.11 | Mike Morgan | 123.3 | LAN |
| +062+ | 2.05 | Doug Drabek | 116.7 | PIT |
| +066+ | 1.98 | Kevin Brown | 129.3 | TEX |
| +067+ | 1.96 | Bill Sampen | 51.3 | WAS |
_