| Starter | Tm | Tier | Game |
|---|---|---|---|
| Juan Nieves | MIL | -4.02 | 198805070_MIL_KCA |
| Mike Morgan | BAL | -2.79 | 198805070_CHA_BAL |
| Mike Moore | SEA | -2.6 | 198805060_DET_SEA |
| Jamie Moyer | CHN | -2.11 | 198805070_SFN_CHN |
| Dave Stieb | TOR | -0.63 | 198805060_TOR_ANA |
Based on accumulated WAA for this season up to 1988-05-08.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 2.93 | Ron Darling | 55 | NYN |
| +004+ | 2.38 | Bob Knepper | 35 | HOU |
| +005+ | 2.32 | Dave LaPoint | 51 | CHA |
| +006+ | 2.31 | Kevin Gross | 52.7 | PHI |
| +008+ | 2.3 | Orel Hershiser | 46.7 | LAN |
| +009+ | 2.25 | Bob Walk | 40 | PIT |
| +010+ | 2.2 | Pascual Perez | 53 | WAS |
| +011+ | 2.14 | Chris Bosio | 58 | MIL |
| +013+ | 2.13 | Larry McWilliams | 25.7 | SLN |
| +014+ | 2.11 | Dwight Gooden | 53 | NYN |
| +016+ | 2.09 | Mike Scott | 56 | HOU |
| +017+ | 2.07 | Greg Swindell | 57.7 | CLE |
| +019+ | 2.04 | Roger Clemens | 58 | BOS |
| +020+ | 2.02 | Rick Reuschel | 42.7 | SFN |
| +021+ | 1.98 | Dave Stewart | 63.3 | OAK |
| +026+ | 1.8 | Tom Candiotti | 52.3 | CLE |
| +027+ | 1.76 | Teddy Higuera | 47 | MIL |
| +028+ | 1.74 | Charlie Hough | 53.3 | TEX |
| +030+ | 1.67 | Greg Maddux | 54.3 | CHN |
| +031+ | 1.61 | John Tudor | 20 | SLN |
| +034+ | 1.57 | Paul Kilgus | 44.7 | TEX |
| +036+ | 1.53 | Frank Viola | 51.7 | MIN |
| +040+ | 1.44 | John Farrell | 46 | CLE |
| +045+ | 1.37 | Bill Wegman | 45 | MIL |
| +048+ | 1.31 | Brian Fisher | 29.3 | PIT |
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