| Starter | Tm | Tier | Game |
|---|---|---|---|
| Chuck Finley | ANA | 7.11 | 199009280_KCA_ANA |
| Danny Darwin | HOU | 4.26 | 199009280_ATL_HOU |
| Steve Farr | KCA | 4 | 199009280_KCA_ANA |
| Zane Smith | PIT | 3.68 | 199009260_CHN_PIT |
| Jose Rijo | CIN | 2.97 | 199009260_ATL_CIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Frank Tanana | DET | -5.83 | 199009260_SEA_DET |
| Mike Bielecki | CHN | -2.93 | 199009270_CHN_PIT |
| Jeff Ballard | BAL | -1.77 | 199009260_BAL_NYA |
| Steve Avery | ATL | -1.5 | 199009270_ATL_CIN |
| Sergio Valdez | CLE | -1.32 | 199009280_BAL_CLE |
Based on accumulated WAA for this season up to 1990-09-28.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +005+ | 7.9 | Chuck Finley | 236 | ANA |
| +006+ | 7.54 | Dave Stewart | 258 | OAK |
| +012+ | 6.4 | Frank Viola | 235.7 | NYN |
| +014+ | 6.2 | Danny Darwin | 162.7 | HOU |
| +015+ | 6.14 | Ed Whitson | 222.7 | SDN |
| +018+ | 5.9 | Zane Smith | 210.3 | TOT |
| +020+ | 5.68 | Steve Farr | 127 | KCA |
| +026+ | 5.11 | Doug Drabek | 222.3 | PIT |
| +029+ | 4.97 | Jose Rijo | 192 | CIN |
| +034+ | 4.6 | Ramon Martinez | 225.3 | LAN |
| +038+ | 4.5 | Bob Welch | 231 | OAK |
| +039+ | 4.44 | Dennis Martinez | 226 | WAS |
| +040+ | 4.42 | Kevin Appier | 177.7 | KCA |
| +041+ | 4.18 | Dave Stieb | 201.7 | TOR |
| +044+ | 3.86 | Norm Charlton | 146.7 | CIN |
| +046+ | 3.83 | Oil Can Boyd | 190.7 | WAS |
| +048+ | 3.73 | Greg Hibbard | 207.3 | CHA |
| +052+ | 3.62 | Ben McDonald | 110 | BAL |
| +054+ | 3.5 | Bruce Hurst | 223.7 | SDN |
| +059+ | 3.35 | Dave Wells | 183 | TOR |
| +067+ | 3.15 | Charlie Leibrandt | 152.3 | ATL |
| +083+ | 2.61 | Randy Tomlin | 75.7 | PIT |
| +084+ | 2.59 | Erik Hanson | 227 | SEA |
| +087+ | 2.57 | Mike Boddicker | 221 | BOS |
| +088+ | 2.55 | Ron Robinson | 170.7 | TOT |
_