| Starter | Tm | Tier | Game |
|---|---|---|---|
| Orel Hershiser | LAN | 6.99 | 199004190_HOU_LAN |
| Joe Magrane | SLN | 4.55 | 199004190_PIT_SLN |
| Roger Clemens | BOS | 3.07 | 199004180_BOS_CHA |
| Rick Reuschel | SFN | 2.72 | 199004200_SFN_SDN |
| Greg Maddux | CHN | 2.67 | 199004180_CHN_NYN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jack Morris | DET | -3.43 | 199004180_NYA_DET |
| Todd Stottlemyre | TOR | -2.45 | 199004200_KCA_TOR |
| Walt Terrell | PIT | -2.12 | 199004200_PIT_CHN |
| Bobby Witt | TEX | -1.92 | 199004190_MIL_TEX |
| Andy Hawkins | NYA | -1.6 | 199004200_NYA_TEX |
Based on accumulated WAA for this season up to 1990-04-20.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 1.65 | Dennis Cook | 20.3 | PHI |
| +003+ | 1.53 | Chris Bosio | 19 | MIL |
| +004+ | 1.29 | Kevin Tapani | 19 | MIN |
| XXXXX | 1.19 | Chuck Finley | 14.3 | ANA |
| XXXXX | 1.17 | Frank Viola | 13.7 | NYN |
| XXXXX | 1.16 | John Tudor | 13 | SLN |
| XXXXX | 1.04 | Teddy Higuera | 11.3 | MIL |
| XXXXX | 1.01 | Pascual Perez | 11 | NYA |
| XXXXX | 0.98 | Zane Smith | 21 | WAS |
| XXXXX | 0.96 | Bob Welch | 18.7 | OAK |
| XXXXX | 0.96 | John Dopson | 10.7 | BOS |
| XXXXX | 0.9 | Jack Armstrong | 13 | CIN |
| XXXXX | 0.83 | Mike LaCoss | 14 | SFN |
| XXXXX | 0.81 | Dave Stewart | 19.3 | OAK |
| XXXXX | 0.79 | Kirk McCaskill | 12 | ANA |
| XXXXX | 0.73 | Neal Heaton | 12.7 | PIT |
| XXXXX | 0.69 | Dennis Martinez | 20 | WAS |
| XXXXX | 0.68 | Mike Morgan | 14.7 | LAN |
| XXXXX | 0.66 | Dave Stieb | 12 | TOR |
| XXXXX | 0.65 | Storm Davis | 12.3 | KCA |
| XXXXX | 0.65 | Greg Maddux | 14.7 | CHN |
| XXXXX | 0.64 | Brian Holman | 21 | SEA |
| XXXXX | 0.52 | Scott Sanderson | 11 | OAK |
| XXXXX | 0.51 | Bruce Ruffin | 19.3 | PHI |
| XXXXX | 0.51 | Ed Whitson | 15 | SDN |
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