| Starter | Tm | Tier | Game |
|---|---|---|---|
| Frank Viola | NYN | 6.61 | 199006160_NYN_PIT |
| Doug Drabek | PIT | 5.24 | 199006160_NYN_PIT |
| Bret Saberhagen | KCA | 4.18 | 199006170_MIN_KCA |
| Bob Welch | OAK | 3.66 | 199006150_OAK_CHA |
| Chuck Finley | ANA | 2.64 | 199006170_ANA_DET |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jack Morris | DET | -5.65 | 199006160_ANA_DET |
| Andy Hawkins | NYA | -5.55 | 199006160_TOR_NYA |
| Walt Terrell | PIT | -2.7 | 199006150_NYN_PIT |
| Bruce Ruffin | PHI | -2.61 | 199006152_CHN_PHI |
| Jim Clancy | HOU | -2.07 | 199006150_HOU_CIN |
Based on accumulated WAA for this season up to 1990-06-17.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +006+ | 4.16 | Jack Armstrong | 90.3 | CIN |
| +008+ | 3.8 | Tom Browning | 100.3 | CIN |
| +010+ | 3.59 | Dave Stewart | 97.7 | OAK |
| +011+ | 3.48 | Roger Clemens | 104 | BOS |
| +015+ | 3.18 | Bob Welch | 100 | OAK |
| +019+ | 2.86 | Teddy Higuera | 55.7 | MIL |
| +020+ | 2.84 | Dave Stieb | 84 | TOR |
| +021+ | 2.75 | Dennis Martinez | 92 | WAS |
| +022+ | 2.72 | Frank Viola | 89.3 | NYN |
| +023+ | 2.71 | Mark Gardner | 71 | WAS |
| +024+ | 2.7 | Bud Black | 99 | CLE |
| +025+ | 2.65 | Bret Saberhagen | 102 | KCA |
| +026+ | 2.64 | Chuck Finley | 87 | ANA |
| +028+ | 2.61 | Eric King | 74.7 | CHA |
| +030+ | 2.45 | John Tudor | 68 | SLN |
| +033+ | 2.37 | Dan Petry | 76 | DET |
| +034+ | 2.36 | Ramon Martinez | 87.3 | LAN |
| +037+ | 2.29 | Tim Leary | 88 | NYA |
| +044+ | 2.1 | Ed Whitson | 87.3 | SDN |
| +046+ | 2.05 | Kirk McCaskill | 57.3 | ANA |
| +055+ | 1.86 | Neal Heaton | 81.3 | PIT |
| +058+ | 1.8 | Greg Hibbard | 77.3 | CHA |
| +057+ | 1.8 | Mike Morgan | 92.7 | LAN |
| +068+ | 1.63 | Mike Boddicker | 95.3 | BOS |
| +069+ | 1.63 | Doug Drabek | 85.7 | PIT |
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