| Starter | Tm | Tier | Game |
|---|---|---|---|
| Frank Tanana | DET | -5.99 | 199009210_DET_OAK |
| Derek Lilliquist | SDN | -2.89 | 199009190_SDN_LAN |
| Steve Avery | ATL | -1.72 | 199009210_HOU_ATL |
| Sergio Valdez | CLE | -1.51 | 199009190_MIL_CLE |
| Jose DeLeon | SLN | -1.16 | 199009210_SLN_PIT |
Based on accumulated WAA for this season up to 1990-09-21.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +005+ | 7.51 | Chuck Finley | 222 | ANA |
| +006+ | 7.27 | Ed Whitson | 218.7 | SDN |
| +007+ | 6.78 | Dave Stewart | 249 | OAK |
| +010+ | 6.55 | Frank Viola | 229.7 | NYN |
| +017+ | 5.73 | Danny Darwin | 149.7 | HOU |
| +022+ | 5.18 | Zane Smith | 201.3 | TOT |
| +026+ | 5 | Doug Drabek | 213.3 | PIT |
| +027+ | 4.99 | Norm Charlton | 142.3 | CIN |
| +031+ | 4.64 | Jose Rijo | 183 | CIN |
| +032+ | 4.63 | Steve Farr | 112.7 | KCA |
| +033+ | 4.58 | Kevin Appier | 169.7 | KCA |
| +034+ | 4.56 | Dennis Martinez | 219 | WAS |
| +036+ | 4.36 | Ramon Martinez | 219.3 | LAN |
| +038+ | 4.31 | Dave Stieb | 191 | TOR |
| +039+ | 4.27 | Bob Welch | 223.3 | OAK |
| +043+ | 4.06 | Oil Can Boyd | 180.3 | WAS |
| +050+ | 3.4 | Tim Crews | 97.7 | LAN |
| +054+ | 3.33 | Kirk McCaskill | 170.7 | ANA |
| +059+ | 3.28 | Greg Hibbard | 199.3 | CHA |
| +063+ | 3.2 | Bruce Hurst | 208.3 | SDN |
| +064+ | 3.18 | Dave Wells | 176 | TOR |
| +073+ | 2.86 | Greg Maddux | 217.7 | CHN |
| +075+ | 2.85 | Bobby Witt | 210.7 | TEX |
| +079+ | 2.62 | Erik Hanson | 219.7 | SEA |
| +090+ | 2.39 | Randy Tomlin | 61.3 | PIT |
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