| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dennis Martinez | WAS | 6.45 | 199007040_CIN_WAS |
| Dave Stewart | OAK | 5.71 | 199007040_OAK_MIL |
| Bret Saberhagen | KCA | 3.89 | 199007040_NYA_KCA |
| Ted Higuera | MIL | 3.76 | 199007050_OAK_MIL |
| John Tudor | SLN | 3.3 | 199007060_SLN_SDN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jack Morris | DET | -6.94 | 199007060_KCA_DET |
| Andy Hawkins | NYA | -3.37 | 199007061_MIN_NYA |
| Sergio Valdez | CLE | -2.16 | 199007062_OAK_CLE |
| David West | MIN | -1.92 | 199007040_BOS_MIN |
| Jim Abbott | ANA | -1.53 | 199007040_ANA_TOR |
Based on accumulated WAA for this season up to 1990-07-06.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +005+ | 4.45 | Jack Armstrong | 114.7 | CIN |
| +007+ | 4.4 | Frank Viola | 115.3 | NYN |
| +008+ | 4.37 | Roger Clemens | 129.7 | BOS |
| +014+ | 3.46 | Dennis Martinez | 123 | WAS |
| +015+ | 3.46 | Chuck Finley | 108 | ANA |
| +017+ | 3.33 | Greg Hibbard | 97.3 | CHA |
| +018+ | 3.26 | Tom Browning | 124.7 | CIN |
| +023+ | 3.06 | Mark Gardner | 95.7 | WAS |
| +026+ | 2.85 | Dave Stewart | 126 | OAK |
| +027+ | 2.85 | Bob Welch | 123.7 | OAK |
| +032+ | 2.74 | Bret Saberhagen | 121 | KCA |
| +034+ | 2.66 | Ed Whitson | 113.3 | SDN |
| +036+ | 2.61 | Teddy Higuera | 67.7 | MIL |
| +039+ | 2.46 | Eric King | 94.7 | CHA |
| +043+ | 2.33 | John Tudor | 92 | SLN |
| +044+ | 2.33 | Danny Darwin | 57.3 | HOU |
| +048+ | 2.27 | Steve Farr | 54.3 | KCA |
| +051+ | 2.25 | Kirk McCaskill | 80.7 | ANA |
| +055+ | 2.2 | Trevor Wilson | 43 | SFN |
| +056+ | 2.19 | Mike Boddicker | 119.7 | BOS |
| +062+ | 1.92 | Ramon Martinez | 112.3 | LAN |
| +075+ | 1.74 | Zane Smith | 97.3 | WAS |
| +076+ | 1.72 | Dave Stieb | 100 | TOR |
| +079+ | 1.68 | Oil Can Boyd | 96.7 | WAS |
| +080+ | 1.67 | Greg Harris | 86.7 | BOS |
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