| Starter | Tm | Tier | Game |
|---|---|---|---|
| Joe Magrane | SLN | 3.68 | 199004290_SLN_SFN |
| Mark Langston | ANA | 3.58 | 199004290_ANA_NYA |
| Doug Drabek | PIT | 3.19 | 199004290_PIT_SDN |
| Chris Bosio | MIL | 2.78 | 199004290_MIL_DET |
| Roger Clemens | BOS | 2.76 | 199004290_OAK_BOS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rich Dotson | KCA | -3.47 | 199004290_TEX_KCA |
| Oil Can Boyd | WAS | -3.27 | 199004280_WAS_CIN |
| Jack Morris | DET | -2.14 | 199004270_MIL_DET |
| Terry Mulholland | PHI | -1.74 | 199004280_PHI_ATL |
| Tom Glavine | ATL | -1.64 | 199004280_PHI_ATL |
Based on accumulated WAA for this season up to 1990-04-29.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 2.03 | Dennis Cook | 27.3 | PHI |
| +003+ | 1.86 | John Tudor | 28 | SLN |
| +005+ | 1.82 | Chuck Finley | 28 | ANA |
| +004+ | 1.82 | Chris Bosio | 32.3 | MIL |
| +006+ | 1.81 | Dave Stewart | 34 | OAK |
| +010+ | 1.51 | Frank Viola | 27.3 | NYN |
| +012+ | 1.43 | Zane Smith | 28 | WAS |
| +013+ | 1.39 | Jack Armstrong | 25.7 | CIN |
| +015+ | 1.37 | Mike Morgan | 29.7 | LAN |
| +017+ | 1.34 | Dennis Martinez | 27 | WAS |
| +019+ | 1.3 | Pete Smith | 28.3 | ATL |
| +020+ | 1.29 | Ed Whitson | 24 | SDN |
| +023+ | 1.26 | Bob Welch | 25 | OAK |
| XXXXX | 1.2 | Greg Maddux | 27.7 | CHN |
| XXXXX | 1.2 | Jim Deshaies | 26 | HOU |
| XXXXX | 1.07 | Kirk McCaskill | 17 | ANA |
| XXXXX | 1.06 | Nolan Ryan | 28 | TEX |
| XXXXX | 1.01 | Ramon Martinez | 28 | LAN |
| XXXXX | 0.99 | Doug Drabek | 30.3 | PIT |
| XXXXX | 0.94 | Brian Holman | 27 | SEA |
| XXXXX | 0.94 | Mike LaCoss | 27.7 | SFN |
| XXXXX | 0.92 | Mark Langston | 25 | ANA |
| XXXXX | 0.9 | Tom Gordon | 17 | KCA |
| XXXXX | 0.85 | Pascual Perez | 14 | NYA |
| XXXXX | 0.83 | Atlee Hammaker | 24 | SFN |
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