| Starter | Tm | Tier | Game |
|---|---|---|---|
| Frank Viola | NYN | 7.85 | 199007180_NYN_HOU |
| Dennis Martinez | WAS | 6.74 | 199007180_WAS_CIN |
| Dave Stewart | OAK | 4.32 | 199007182_CLE_OAK |
| Tom Browning | CIN | 3.56 | 199007180_WAS_CIN |
| Doug Drabek | PIT | 3.26 | 199007180_SFN_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jack Morris | DET | -6.52 | 199007170_CHA_DET |
| Andy Hawkins | NYA | -4.43 | 199007170_KCA_NYA |
| Storm Davis | KCA | -1.45 | 199007170_KCA_NYA |
| Todd Stottlemyre | TOR | -1.1 | 199007180_TOR_SEA |
| David West | MIN | -1.07 | 199007180_MIN_BOS |
Based on accumulated WAA for this season up to 1990-07-19.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +005+ | 5.16 | Frank Viola | 135 | NYN |
| +012+ | 3.98 | Bob Welch | 139 | OAK |
| +013+ | 3.97 | Chuck Finley | 126 | ANA |
| +018+ | 3.66 | Dave Stewart | 149.3 | OAK |
| +020+ | 3.55 | Jack Armstrong | 124 | CIN |
| +021+ | 3.53 | Mark Gardner | 110.7 | WAS |
| +022+ | 3.44 | Dennis Martinez | 142 | WAS |
| +023+ | 3.27 | Tom Browning | 144.3 | CIN |
| +028+ | 3.12 | Ed Whitson | 128.3 | SDN |
| +037+ | 2.83 | Ramon Martinez | 127.3 | LAN |
| +039+ | 2.8 | Bill Swift | 63 | SEA |
| +040+ | 2.71 | Danny Darwin | 64.3 | HOU |
| +041+ | 2.65 | Greg Hibbard | 114 | CHA |
| +044+ | 2.51 | John Tudor | 99 | SLN |
| +046+ | 2.47 | Bret Saberhagen | 125 | KCA |
| +051+ | 2.33 | Kirk McCaskill | 91.3 | ANA |
| +055+ | 2.28 | Doug Drabek | 124.7 | PIT |
| +061+ | 2.18 | Oil Can Boyd | 109.7 | WAS |
| +063+ | 2.1 | Dave Wells | 95 | TOR |
| +066+ | 2.04 | Mike Morgan | 123.3 | LAN |
| +072+ | 1.9 | Dave Stieb | 106.7 | TOR |
| +080+ | 1.73 | Kevin Brown | 136.3 | TEX |
| +086+ | 1.66 | Bill Sampen | 55.3 | WAS |
| +092+ | 1.55 | Greg Harris | 99.7 | BOS |
| +095+ | 1.54 | Eric King | 104 | CHA |
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