| 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 |
| Eric Show | SDN | -2.17 | 199007160_SDN_CHN |
| Jimmy Key | TOR | -2 | 199007160_TOR_SEA |
| Jeff Ballard | BAL | -1.52 | 199007160_TEX_BAL |
Based on accumulated WAA for this season up to 1990-07-18.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 5.19 | Frank Viola | 135 | NYN |
| +012+ | 4.02 | Bob Welch | 139 | OAK |
| +013+ | 4.01 | Chuck Finley | 126 | ANA |
| +018+ | 3.69 | Dave Stewart | 149.3 | OAK |
| +019+ | 3.67 | Jack Armstrong | 118 | CIN |
| +021+ | 3.57 | Mark Gardner | 110.7 | WAS |
| +022+ | 3.49 | Dennis Martinez | 142 | WAS |
| +023+ | 3.31 | Tom Browning | 144.3 | CIN |
| +027+ | 3.16 | Bud Black | 132 | CLE |
| +028+ | 3.14 | Ed Whitson | 128.3 | SDN |
| +035+ | 2.86 | Ramon Martinez | 127.3 | LAN |
| +038+ | 2.81 | Bill Swift | 63 | SEA |
| +039+ | 2.74 | Danny Darwin | 64.3 | HOU |
| +040+ | 2.66 | Greg Hibbard | 114 | CHA |
| +045+ | 2.54 | John Tudor | 99 | SLN |
| +046+ | 2.5 | Bret Saberhagen | 125 | KCA |
| +051+ | 2.35 | Kirk McCaskill | 91.3 | ANA |
| +053+ | 2.31 | Doug Drabek | 124.7 | PIT |
| +061+ | 2.13 | Dave Wells | 95 | TOR |
| +063+ | 2.1 | Oil Can Boyd | 103.7 | WAS |
| +064+ | 2.07 | Mike Morgan | 123.3 | LAN |
| +071+ | 1.93 | Dave Stieb | 106.7 | TOR |
| +079+ | 1.77 | Kevin Brown | 136.3 | TEX |
| +082+ | 1.71 | Bill Sampen | 53.3 | WAS |
| +091+ | 1.56 | Eric King | 104 | CHA |
_