| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dave Stewart | OAK | 6.54 | 199009250_OAK_KCA |
| Zane Smith | PIT | 3.68 | 199009260_CHN_PIT |
| Norm Charlton | CIN | 3.48 | 199009250_ATL_CIN |
| Kevin Appier | KCA | 2.92 | 199009250_OAK_KCA |
| Dennis Martinez | WAS | 2.79 | 199009260_NYN_WAS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Walt Terrell | DET | -6.08 | 199009250_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 |
| Melido Perez | CHA | -1.32 | 199009270_MIL_CHA |
Based on accumulated WAA for this season up to 1990-09-27.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +005+ | 7.56 | Dave Stewart | 258 | OAK |
| +006+ | 7.2 | Chuck Finley | 228 | ANA |
| +013+ | 6.42 | Frank Viola | 235.7 | NYN |
| +014+ | 6.15 | Ed Whitson | 222.7 | SDN |
| +016+ | 5.91 | Zane Smith | 210.3 | TOT |
| +019+ | 5.59 | Danny Darwin | 155.7 | HOU |
| +021+ | 5.42 | Steve Farr | 121.7 | KCA |
| +027+ | 5.13 | Doug Drabek | 222.3 | PIT |
| +029+ | 4.98 | Jose Rijo | 192 | CIN |
| +034+ | 4.6 | Ramon Martinez | 225.3 | LAN |
| +037+ | 4.52 | Bob Welch | 231 | OAK |
| +038+ | 4.51 | Oil Can Boyd | 186.3 | WAS |
| +039+ | 4.45 | Dennis Martinez | 226 | WAS |
| +040+ | 4.43 | Kevin Appier | 177.7 | KCA |
| +043+ | 3.98 | Dave Stieb | 194.7 | TOR |
| +045+ | 3.87 | Norm Charlton | 146.7 | CIN |
| +048+ | 3.75 | Greg Hibbard | 207.3 | CHA |
| +055+ | 3.36 | Dave Wells | 183 | TOR |
| +064+ | 3.17 | Charlie Leibrandt | 152.3 | ATL |
| +074+ | 2.81 | Ben McDonald | 101 | BAL |
| +081+ | 2.65 | Mike Boddicker | 214.7 | BOS |
| +082+ | 2.62 | Randy Tomlin | 75.7 | PIT |
| +083+ | 2.6 | Erik Hanson | 227 | SEA |
| +086+ | 2.57 | Ron Robinson | 170.7 | TOT |
| +096+ | 2.39 | Kirk McCaskill | 174.3 | ANA |
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