| Starter | Tm | Tier | Game |
|---|---|---|---|
| Mike Scott | HOU | 7.97 | 198805110_NYN_HOU |
| Dwight Gooden | NYN | 6.51 | 198805110_NYN_HOU |
| Ted Higuera | MIL | 4.12 | 198805130_CLE_MIL |
| 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 |
| Rich Yett | CLE | -2.98 | 198805110_CLE_ANA |
| Mike Moore | SEA | -2.51 | 198805110_SEA_TOR |
| Jamie Moyer | CHN | -1.84 | 198805130_CHN_HOU |
| Jeff Robinson | DET | -0.67 | 198805110_DET_OAK |
Based on accumulated WAA for this season up to 1988-05-13.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 2.92 | Ron Darling | 55 | NYN |
| +004+ | 2.88 | Chris Bosio | 66 | MIL |
| +005+ | 2.86 | Roger Clemens | 67 | BOS |
| +006+ | 2.77 | Kevin Gross | 60.7 | PHI |
| +008+ | 2.69 | Bob Walk | 47.7 | PIT |
| +010+ | 2.45 | Greg Maddux | 64.3 | CHN |
| +013+ | 2.38 | Paul Kilgus | 53.7 | TEX |
| +012+ | 2.38 | Bob Knepper | 35 | HOU |
| +014+ | 2.36 | Dave LaPoint | 51 | CHA |
| +015+ | 2.33 | Tom Candiotti | 61.3 | CLE |
| +016+ | 2.3 | Larry McWilliams | 33 | SLN |
| +017+ | 2.27 | Pascual Perez | 53 | WAS |
| +021+ | 2.06 | Greg Swindell | 65.3 | CLE |
| +026+ | 1.94 | Danny Jackson | 53 | CIN |
| +027+ | 1.87 | Dave Stewart | 71.3 | OAK |
| +028+ | 1.85 | Teddy Higuera | 54.7 | MIL |
| +034+ | 1.68 | John Farrell | 54 | CLE |
| +037+ | 1.61 | Charlie Hough | 61.3 | TEX |
| +038+ | 1.6 | Frank Viola | 59.3 | MIN |
| +039+ | 1.6 | Jose Guzman | 52 | TEX |
| +041+ | 1.59 | Jim Deshaies | 38 | HOU |
| +042+ | 1.53 | Mike Scott | 61.7 | HOU |
| +044+ | 1.47 | John Tudor | 23.7 | SLN |
| +046+ | 1.44 | Orel Hershiser | 54.7 | LAN |
| +048+ | 1.41 | Fernando Valenzuela | 54.3 | LAN |
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