| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Clemens | BOS | 10.3 | 198805140_SEA_BOS |
| Ted Higuera | MIL | 4.12 | 198805130_CLE_MIL |
| Ron Darling | NYN | 4.12 | 198805140_NYN_SFN |
| Orel Hershiser | LAN | 4.02 | 198805120_LAN_PIT |
| Rick Reuschel | SFN | 2.57 | 198805120_SFN_SLN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Juan Nieves | MIL | -3.6 | 198805120_CLE_MIL |
| Ed Whitson | SDN | -3.13 | 198805140_WAS_SDN |
| Dan Petry | ANA | -1.88 | 198805140_ANA_NYA |
| Jamie Moyer | CHN | -1.84 | 198805130_CHN_HOU |
| Mike Boddicker | BAL | -1.52 | 198805140_OAK_BAL |
Based on accumulated WAA for this season up to 1988-05-14.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 3.64 | Roger Clemens | 76 | BOS |
| +004+ | 2.93 | Ron Darling | 62 | NYN |
| +005+ | 2.85 | Chris Bosio | 66 | MIL |
| +006+ | 2.8 | Bob Knepper | 42.3 | HOU |
| +007+ | 2.77 | Kevin Gross | 60.7 | PHI |
| +010+ | 2.68 | Bob Walk | 47.7 | PIT |
| +013+ | 2.54 | Dave LaPoint | 58 | CHA |
| +014+ | 2.45 | Greg Maddux | 64.3 | CHN |
| +015+ | 2.36 | Paul Kilgus | 53.7 | TEX |
| +016+ | 2.31 | Tom Candiotti | 61.3 | CLE |
| +017+ | 2.27 | Pascual Perez | 53 | WAS |
| +018+ | 2.19 | Larry McWilliams | 33 | SLN |
| +022+ | 2.04 | Greg Swindell | 65.3 | CLE |
| +026+ | 1.93 | Danny Jackson | 53 | CIN |
| +028+ | 1.84 | Dave Stewart | 71.3 | OAK |
| +029+ | 1.82 | Teddy Higuera | 54.7 | MIL |
| +037+ | 1.58 | Charlie Hough | 61.3 | TEX |
| +038+ | 1.58 | Frank Viola | 59.3 | MIN |
| +036+ | 1.58 | Jim Deshaies | 38 | HOU |
| +039+ | 1.57 | Jose Guzman | 52 | TEX |
| +040+ | 1.52 | Mike Scott | 61.7 | HOU |
| +045+ | 1.44 | John Farrell | 61 | CLE |
| +047+ | 1.42 | Orel Hershiser | 54.7 | LAN |
| +048+ | 1.4 | John Tudor | 23.7 | SLN |
| +049+ | 1.39 | Dwight Gooden | 59 | NYN |
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