| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dave Stewart | OAK | 5.25 | 199006190_OAK_DET |
| Tom Browning | CIN | 4.56 | 199006191_CIN_ATL |
| John Tudor | SLN | 3.92 | 199006190_SLN_NYN |
| Dave Stieb | TOR | 3.74 | 199006200_BOS_TOR |
| Mark Langston | ANA | 3.2 | 199006200_ANA_CHA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jack Morris | DET | -5.22 | 199006210_DET_ANA |
| Andy Hawkins | NYA | -4.62 | 199006210_NYA_TOR |
| Jim Clancy | HOU | -3.27 | 199006200_HOU_LAN |
| John Smoltz | ATL | -1.79 | 199006210_CIN_ATL |
| Bruce Ruffin | PHI | -1.58 | 199006200_PIT_PHI |
Based on accumulated WAA for this season up to 1990-06-21.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +006+ | 4.02 | Jack Armstrong | 94 | CIN |
| +007+ | 3.92 | Tom Browning | 107 | CIN |
| +011+ | 3.48 | Dave Stieb | 91.7 | TOR |
| +012+ | 3.47 | Bob Welch | 106 | OAK |
| +014+ | 3.29 | Dennis Martinez | 101 | WAS |
| +017+ | 3.09 | Mark Gardner | 78 | WAS |
| +019+ | 2.96 | Roger Clemens | 105.7 | BOS |
| +024+ | 2.72 | Dave Stewart | 104.7 | OAK |
| +026+ | 2.66 | Frank Viola | 89.3 | NYN |
| +027+ | 2.61 | Bud Black | 99 | CLE |
| +028+ | 2.6 | Chuck Finley | 87 | ANA |
| +029+ | 2.58 | Bret Saberhagen | 102 | KCA |
| +030+ | 2.56 | Eric King | 74.7 | CHA |
| +034+ | 2.49 | Ramon Martinez | 94 | LAN |
| +044+ | 2.24 | Ed Whitson | 94.3 | SDN |
| +046+ | 2.14 | Tim Leary | 96 | NYA |
| +048+ | 2.11 | Kevin Brown | 103.7 | TEX |
| +053+ | 2.04 | John Tudor | 73 | SLN |
| +055+ | 1.96 | Greg Hibbard | 82 | CHA |
| +056+ | 1.94 | Charlie Leibrandt | 32 | ATL |
| +061+ | 1.84 | Kirk McCaskill | 62.3 | ANA |
| +063+ | 1.8 | Neal Heaton | 81.3 | PIT |
| +064+ | 1.74 | Mike Morgan | 92.7 | LAN |
| +074+ | 1.64 | Andy Benes | 87.7 | SDN |
| +076+ | 1.6 | Mike Boddicker | 95.3 | BOS |
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