| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Clemens | BOS | 12.29 | 198805250_BOS_SEA |
| Mike Scott | HOU | 7.17 | 198805230_HOU_PIT |
| Ron Darling | NYN | 4.34 | 198805250_SFN_NYN |
| Ted Higuera | MIL | 4.25 | 198805230_TOR_MIL |
| Orel Hershiser | LAN | 3.5 | 198805240_LAN_PHI |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Juan Nieves | MIL | -3.38 | 198805250_MIL_DET |
| Dan Petry | ANA | -3.23 | 198805250_NYA_ANA |
| Ed Whitson | SDN | -3.07 | 198805250_SDN_WAS |
| Tom Glavine | ATL | -3.04 | 198805250_ATL_CHN |
| Mike Smithson | BOS | -2.24 | 198805240_BOS_SEA |
Based on accumulated WAA for this season up to 1988-05-25.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 4.5 | Roger Clemens | 95 | BOS |
| +004+ | 3.66 | Chris Bosio | 82 | MIL |
| +006+ | 3.2 | Bob Knepper | 56.3 | HOU |
| +007+ | 3.19 | Greg Swindell | 82.7 | CLE |
| +008+ | 3.05 | Greg Maddux | 81 | CHN |
| +009+ | 3.04 | Ron Darling | 77.3 | NYN |
| +010+ | 3.03 | Larry McWilliams | 55.3 | SLN |
| +011+ | 3.02 | Tom Candiotti | 78.3 | CLE |
| +012+ | 2.98 | Kevin Gross | 74.7 | PHI |
| +013+ | 2.95 | Dave LaPoint | 72 | CHA |
| +020+ | 2.53 | Paul Kilgus | 68.3 | TEX |
| +021+ | 2.53 | John Candelaria | 69.7 | NYA |
| +019+ | 2.53 | John Tudor | 39.7 | SLN |
| +022+ | 2.52 | Jim Deshaies | 53.3 | HOU |
| +024+ | 2.44 | Mike Scott | 76.7 | HOU |
| +026+ | 2.32 | David Cone | 46.3 | NYN |
| +029+ | 2.29 | Pascual Perez | 53 | WAS |
| +030+ | 2.29 | Orel Hershiser | 69.7 | LAN |
| +034+ | 2.02 | Frank Viola | 73.7 | MIN |
| +038+ | 1.96 | Dwight Gooden | 74.7 | NYN |
| +041+ | 1.93 | Jose Guzman | 68.7 | TEX |
| +043+ | 1.85 | Dennis Martinez | 69.7 | WAS |
| +047+ | 1.81 | Teddy Higuera | 64 | MIL |
| +048+ | 1.73 | John Farrell | 78 | CLE |
| +049+ | 1.72 | Tim Leary | 58.3 | LAN |
_