| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Clemens | BOS | 13.24 | 199008040_DET_BOS |
| Frank Viola | NYN | 7.78 | 199008020_NYN_WAS |
| Dennis Martinez | WAS | 4.19 | 199008020_NYN_WAS |
| Ed Whitson | SDN | 4.16 | 199008040_SDN_CIN |
| Tom Browning | CIN | 4.14 | 199008020_SDN_CIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Walt Terrell | DET | -4.42 | 199008020_DET_NYA |
| Bruce Ruffin | PHI | -1.34 | 199008030_PIT_PHI |
| Todd Stottlemyre | TOR | -1.19 | 199008040_TOR_TEX |
| Ken Hill | SLN | -0.62 | 199008040_NYN_SLN |
| Jamie Moyer | TEX | -0.55 | 199008030_TOR_TEX |
Based on accumulated WAA for this season up to 1990-08-04.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 7.66 | Roger Clemens | 176.3 | BOS |
| +005+ | 6.03 | Frank Viola | 158 | NYN |
| +006+ | 5.64 | Chuck Finley | 153 | ANA |
| +009+ | 4.86 | Dave Stewart | 174.3 | OAK |
| +012+ | 4.56 | Danny Darwin | 88.3 | HOU |
| +015+ | 4.22 | Ramon Martinez | 153.3 | LAN |
| +016+ | 4.07 | Ed Whitson | 156.7 | SDN |
| +017+ | 4.02 | Doug Drabek | 150 | PIT |
| +020+ | 3.91 | John Tudor | 122.3 | SLN |
| +022+ | 3.86 | Bill Swift | 83.7 | SEA |
| +033+ | 3.26 | Greg Hibbard | 136 | CHA |
| +034+ | 3.13 | Dennis Martinez | 163.7 | WAS |
| +038+ | 3.01 | Mark Gardner | 127.7 | WAS |
| +042+ | 2.87 | Tom Browning | 161.7 | CIN |
| +043+ | 2.85 | Tom Candiotti | 139.3 | CLE |
| +047+ | 2.74 | Dave Stieb | 127.7 | TOR |
| +049+ | 2.71 | Jack Armstrong | 143.7 | CIN |
| +055+ | 2.62 | Kevin Brown | 160.3 | TEX |
| +058+ | 2.55 | Oil Can Boyd | 122.7 | WAS |
| +063+ | 2.45 | Bob Welch | 152.3 | OAK |
| +066+ | 2.38 | Norm Charlton | 82 | CIN |
| +069+ | 2.36 | Bud Black | 156.7 | CLE |
| +079+ | 2.09 | Kevin Appier | 107 | KCA |
| +081+ | 2.05 | Zane Smith | 133.3 | WAS |
| +085+ | 2.04 | Greg Harris | 120 | BOS |
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