| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Clemens | BOS | 10.95 | 198804290_MIN_BOS |
| Orel Hershiser | LAN | 4.09 | 198804290_SLN_LAN |
| Jack Morris | DET | 2.43 | 198804290_SEA_DET |
| Charlie Hough | TEX | 1.89 | 198804290_TEX_NYA |
| Danny Darwin | HOU | 1.87 | 198804290_WAS_HOU |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Mike Boddicker | BAL | -2.92 | 198804280_BAL_MIN |
| Joe Niekro | MIN | -2.84 | 198804290_MIN_BOS |
| Dan Petry | ANA | -2.8 | 198804290_ANA_TOR |
| Bobby Witt | TEX | -2.69 | 198804300_TEX_NYA |
| Al Nipper | CHN | -2.6 | 198804300_CHN_SFN |
Based on accumulated WAA for this season up to 1988-04-30.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 2.46 | Dave LaPoint | 38.3 | CHA |
| +004+ | 2.41 | Roger Clemens | 51.3 | BOS |
| +005+ | 2.32 | Ron Darling | 39 | NYN |
| +006+ | 2.22 | Kevin Gross | 38.3 | PHI |
| +007+ | 2.15 | Charlie Hough | 49.3 | TEX |
| +008+ | 2.12 | Orel Hershiser | 40.3 | LAN |
| +010+ | 1.84 | Pascual Perez | 38 | WAS |
| +011+ | 1.84 | Jose Guzman | 32 | TEX |
| +014+ | 1.72 | Bob Walk | 32 | PIT |
| +016+ | 1.68 | Mike Scott | 41.7 | HOU |
| +017+ | 1.66 | Chris Bosio | 41 | MIL |
| +019+ | 1.62 | Tom Candiotti | 42 | CLE |
| +025+ | 1.49 | Greg Maddux | 41 | CHN |
| +028+ | 1.28 | Brian Fisher | 29.3 | PIT |
| +029+ | 1.27 | Jim Deshaies | 32 | HOU |
| +030+ | 1.26 | Greg Swindell | 42.7 | CLE |
| XXXXX | 1.23 | John Farrell | 37.7 | CLE |
| XXXXX | 1.21 | Bob Knepper | 19 | HOU |
| XXXXX | 1.13 | Rick Reuschel | 28.3 | SFN |
| XXXXX | 1.12 | Dennis Martinez | 39.3 | WAS |
| XXXXX | 0.98 | Mark Gubicza | 34 | KCA |
| XXXXX | 0.91 | Dwight Gooden | 35 | NYN |
| XXXXX | 0.89 | Teddy Higuera | 30.3 | MIL |
| XXXXX | 0.89 | Nolan Ryan | 37.3 | HOU |
| XXXXX | 0.88 | Jimmy Jones | 25.7 | SDN |
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