| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dennis Martinez | WAS | 6.45 | 199006240_PIT_WAS |
| Dave Stieb | TOR | 4.66 | 199006250_TOR_BOS |
| Bob Welch | OAK | 3.87 | 199006250_DET_OAK |
| Mark Langston | ANA | 3.42 | 199006250_CHA_ANA |
| John Tudor | SLN | 3.05 | 199006250_NYN_SLN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jack Morris | DET | -6.84 | 199006260_DET_OAK |
| Andy Hawkins | NYA | -4.77 | 199006260_MIL_NYA |
| Jim Clancy | HOU | -3.03 | 199006260_SDN_HOU |
| Storm Davis | KCA | -1.46 | 199006240_KCA_MIN |
| Bruce Ruffin | PHI | -0.99 | 199006260_PHI_PIT |
Based on accumulated WAA for this season up to 1990-06-26.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +004+ | 4.31 | Jack Armstrong | 102 | CIN |
| +008+ | 3.81 | Roger Clemens | 114.7 | BOS |
| +011+ | 3.6 | Bob Welch | 114 | OAK |
| +013+ | 3.55 | Dennis Martinez | 108 | WAS |
| +014+ | 3.4 | Eric King | 83.7 | CHA |
| +015+ | 3.39 | Chuck Finley | 95.3 | ANA |
| +018+ | 3.31 | Tom Browning | 112 | CIN |
| +020+ | 3.19 | Frank Viola | 97.3 | NYN |
| +021+ | 3.17 | Ramon Martinez | 103 | LAN |
| +024+ | 3.04 | Mark Gardner | 84 | WAS |
| +025+ | 3.03 | Dave Stewart | 114.7 | OAK |
| +028+ | 2.74 | Greg Hibbard | 90.3 | CHA |
| +030+ | 2.67 | Bret Saberhagen | 109 | KCA |
| +036+ | 2.51 | Kirk McCaskill | 69.3 | ANA |
| +037+ | 2.47 | John Tudor | 80 | SLN |
| +044+ | 2.26 | Kevin Brown | 111.7 | TEX |
| +047+ | 2.21 | Dave Stieb | 91.7 | TOR |
| +048+ | 2.2 | Neal Heaton | 87.3 | PIT |
| +050+ | 2.18 | Ed Whitson | 100.3 | SDN |
| +055+ | 1.97 | Doug Drabek | 91.7 | PIT |
| +061+ | 1.87 | Mark Langston | 106.3 | ANA |
| +071+ | 1.75 | Mike Boddicker | 103.7 | BOS |
| +072+ | 1.74 | Mike Morgan | 105.7 | LAN |
| +081+ | 1.63 | Charlie Leibrandt | 40 | ATL |
| +095+ | 1.44 | Tom Gordon | 82 | KCA |
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