| Starter | Tm | Tier | Game |
|---|---|---|---|
| Frank Viola | NYN | 8.9 | 199007230_NYN_PHI |
| Dennis Martinez | WAS | 5.42 | 199007230_PIT_WAS |
| Chuck Finley | ANA | 4.55 | 199007210_CLE_ANA |
| Dave Stewart | OAK | 4.54 | 199007230_ANA_OAK |
| Tom Browning | CIN | 3.26 | 199007230_CIN_SDN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Andy Hawkins | NYA | -7.15 | 199007220_NYA_MIN |
| Jack Morris | DET | -6.61 | 199007220_DET_TEX |
| Eric Show | SDN | -2.71 | 199007210_SDN_SLN |
| Bruce Ruffin | PHI | -2.01 | 199007230_NYN_PHI |
| Storm Davis | KCA | -1.83 | 199007220_BOS_KCA |
Based on accumulated WAA for this season up to 1990-07-23.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +006+ | 5.27 | Roger Clemens | 149.7 | BOS |
| +007+ | 4.8 | Frank Viola | 141 | NYN |
| +011+ | 4.3 | Chuck Finley | 135 | ANA |
| +013+ | 4.22 | Dennis Martinez | 151 | WAS |
| +017+ | 3.9 | Bob Welch | 139 | OAK |
| +018+ | 3.72 | Mark Gardner | 117.7 | WAS |
| +021+ | 3.5 | Jack Armstrong | 124 | CIN |
| +023+ | 3.42 | Tom Browning | 151.3 | CIN |
| +025+ | 3.32 | Danny Darwin | 71.3 | HOU |
| +030+ | 3.18 | Dave Stewart | 154.3 | OAK |
| +035+ | 3.04 | Greg Hibbard | 121 | CHA |
| +039+ | 2.91 | Ed Whitson | 135.3 | SDN |
| +040+ | 2.79 | Ramon Martinez | 127.3 | LAN |
| +042+ | 2.73 | Bill Swift | 69.3 | SEA |
| +043+ | 2.7 | John Tudor | 106 | SLN |
| +044+ | 2.61 | Kirk McCaskill | 97.3 | ANA |
| +052+ | 2.38 | Dave Stieb | 114.7 | TOR |
| +060+ | 2.24 | Doug Drabek | 124.7 | PIT |
| +061+ | 2.16 | Oil Can Boyd | 109.7 | WAS |
| +063+ | 2.14 | Eric King | 111 | CHA |
| +066+ | 2.09 | Kevin Appier | 94 | KCA |
| +067+ | 2.07 | Dave Wells | 95 | TOR |
| +068+ | 2.06 | Kevin Brown | 145.3 | TEX |
| +074+ | 1.91 | Bud Black | 137.3 | CLE |
| +083+ | 1.87 | Mark Knudson | 121 | MIL |
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