| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Clemens | BOS | 8.06 | 199006180_BOS_BAL |
| Frank Viola | NYN | 6.61 | 199006160_NYN_PIT |
| Dennis Martinez | WAS | 5.67 | 199006180_CHN_WAS |
| Doug Drabek | PIT | 5.24 | 199006160_NYN_PIT |
| Bret Saberhagen | KCA | 4.18 | 199006170_MIN_KCA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jack Morris | DET | -5.65 | 199006160_ANA_DET |
| Andy Hawkins | NYA | -5.55 | 199006160_TOR_NYA |
| Jim Abbott | ANA | -1.92 | 199006180_ANA_CHA |
| Bobby Witt | TEX | -1.76 | 199006170_TEX_SEA |
| Todd Stottlemyre | TOR | -1.56 | 199006170_TOR_NYA |
Based on accumulated WAA for this season up to 1990-06-18.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +006+ | 4.14 | Jack Armstrong | 90.3 | CIN |
| +009+ | 3.78 | Tom Browning | 100.3 | CIN |
| +010+ | 3.59 | Dave Stewart | 97.7 | OAK |
| +011+ | 3.33 | Dennis Martinez | 101 | WAS |
| +015+ | 3.17 | Bob Welch | 100 | OAK |
| +017+ | 2.99 | Roger Clemens | 105.7 | BOS |
| +021+ | 2.82 | Dave Stieb | 84 | TOR |
| +022+ | 2.7 | Frank Viola | 89.3 | NYN |
| +023+ | 2.7 | Mark Gardner | 71 | WAS |
| +024+ | 2.67 | Bud Black | 99 | CLE |
| +026+ | 2.63 | Bret Saberhagen | 102 | KCA |
| +027+ | 2.62 | Chuck Finley | 87 | ANA |
| +028+ | 2.59 | Eric King | 74.7 | CHA |
| +030+ | 2.43 | John Tudor | 68 | SLN |
| +033+ | 2.35 | Dan Petry | 76 | DET |
| +034+ | 2.34 | Ramon Martinez | 87.3 | LAN |
| +036+ | 2.31 | Ed Whitson | 94.3 | SDN |
| +042+ | 2.19 | Tim Leary | 96 | NYA |
| +048+ | 2.04 | Kirk McCaskill | 57.3 | ANA |
| +057+ | 1.84 | Neal Heaton | 81.3 | PIT |
| +059+ | 1.78 | Greg Hibbard | 77.3 | CHA |
| +060+ | 1.78 | Mike Morgan | 92.7 | LAN |
| +070+ | 1.62 | Mike Boddicker | 95.3 | BOS |
| +072+ | 1.61 | Doug Drabek | 85.7 | PIT |
| +074+ | 1.58 | Bill Krueger | 55.7 | MIL |
_