| Starter | Tm | Tier | Game |
|---|---|---|---|
| Frank Viola | NYN | 6.82 | 199008120_CHN_NYN |
| Chuck Finley | ANA | 6.1 | 199008110_BAL_ANA |
| Danny Darwin | HOU | 4.32 | 199008110_SDN_HOU |
| Tom Browning | CIN | 2.73 | 199008120_SFN_CIN |
| Bill Swift | SEA | 2.14 | 199008110_BOS_SEA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Walt Terrell | DET | -5.1 | 199008130_DET_CLE |
| Andy Hawkins | NYA | -4.42 | 199008110_NYA_OAK |
| Derek Lilliquist | SDN | -4.25 | 199008120_SDN_HOU |
| Mike Bielecki | CHN | -3.4 | 199008110_CHN_NYN |
| Mark Grant | ATL | -1.54 | 199008110_LAN_ATL |
Based on accumulated WAA for this season up to 1990-08-13.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 7.76 | Roger Clemens | 183 | BOS |
| +005+ | 6.28 | Dave Stewart | 190 | OAK |
| +006+ | 5.91 | Chuck Finley | 168 | ANA |
| +008+ | 4.85 | Ed Whitson | 165 | SDN |
| +010+ | 4.76 | John Tudor | 132.3 | SLN |
| +012+ | 4.69 | Frank Viola | 168.3 | NYN |
| +014+ | 4.61 | Bill Swift | 94.7 | SEA |
| +015+ | 4.59 | Danny Darwin | 100.3 | HOU |
| +018+ | 4.34 | Ramon Martinez | 161.3 | LAN |
| +029+ | 3.54 | Tom Browning | 176 | CIN |
| +031+ | 3.44 | Dennis Martinez | 172.7 | WAS |
| +034+ | 3.31 | Doug Drabek | 156.7 | PIT |
| +038+ | 3.2 | Norm Charlton | 91 | CIN |
| +039+ | 3.18 | Mark Gardner | 132.7 | WAS |
| +041+ | 3.12 | Bob Welch | 166.7 | OAK |
| +053+ | 2.82 | Oil Can Boyd | 135.7 | WAS |
| +059+ | 2.57 | Kirk McCaskill | 121.7 | ANA |
| +061+ | 2.55 | Ben McDonald | 46.3 | BAL |
| +062+ | 2.53 | Tom Candiotti | 154 | CLE |
| +063+ | 2.52 | Dave Stieb | 141.3 | TOR |
| +078+ | 2.12 | Tom Bolton | 62 | BOS |
| +089+ | 2.02 | Kevin Appier | 120 | KCA |
| +090+ | 1.98 | John Burkett | 141.3 | SFN |
| +092+ | 1.96 | Bob Tewksbury | 88 | SLN |
| +097+ | 1.93 | Mike Morgan | 155.7 | LAN |
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