| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Clemens | BOS | 10.46 | 199007201_BOS_KCA |
| Frank Viola | NYN | 7.85 | 199007180_NYN_HOU |
| Dennis Martinez | WAS | 6.74 | 199007180_WAS_CIN |
| Dave Stewart | OAK | 4.32 | 199007182_CLE_OAK |
| Ed Whitson | SDN | 3.93 | 199007200_SDN_SLN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Frank Tanana | DET | -5 | 199007180_CHA_DET |
| Bert Blyleven | ANA | -1.41 | 199007200_CLE_ANA |
| Todd Stottlemyre | TOR | -1.1 | 199007180_TOR_SEA |
| David West | MIN | -1.07 | 199007180_MIN_BOS |
| Bobby Witt | TEX | -1.02 | 199007180_TEX_BAL |
Based on accumulated WAA for this season up to 1990-07-20.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +006+ | 5.29 | Roger Clemens | 149.7 | BOS |
| +007+ | 5.15 | Frank Viola | 135 | NYN |
| +014+ | 3.97 | Chuck Finley | 126 | ANA |
| +013+ | 3.97 | Bob Welch | 139 | OAK |
| +016+ | 3.65 | Dave Stewart | 149.3 | OAK |
| +020+ | 3.54 | Jack Armstrong | 124 | CIN |
| +021+ | 3.54 | Mark Gardner | 110.7 | WAS |
| +022+ | 3.44 | Dennis Martinez | 142 | WAS |
| +023+ | 3.35 | Danny Darwin | 71.3 | HOU |
| +024+ | 3.27 | Tom Browning | 144.3 | CIN |
| +034+ | 2.92 | Ed Whitson | 135.3 | SDN |
| +037+ | 2.83 | Ramon Martinez | 127.3 | LAN |
| +039+ | 2.75 | Bill Swift | 69.3 | SEA |
| +040+ | 2.72 | John Tudor | 106 | SLN |
| +042+ | 2.64 | Greg Hibbard | 114 | CHA |
| +045+ | 2.45 | Bret Saberhagen | 125 | KCA |
| +051+ | 2.32 | Kirk McCaskill | 91.3 | ANA |
| +056+ | 2.27 | Doug Drabek | 124.7 | PIT |
| +059+ | 2.19 | Oil Can Boyd | 109.7 | WAS |
| +061+ | 2.16 | Eric King | 111 | CHA |
| +062+ | 2.13 | Kevin Appier | 94 | KCA |
| +064+ | 2.1 | Dave Wells | 95 | TOR |
| +072+ | 1.94 | Bud Black | 137.3 | CLE |
| +075+ | 1.89 | Dave Stieb | 106.7 | TOR |
| +084+ | 1.74 | Norm Charlton | 61.7 | CIN |
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