| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ted Higuera | MIL | 7.6 | 198806200_OAK_MIL |
| Mike Scott | HOU | 5.92 | 198806210_CIN_HOU |
| Orel Hershiser | LAN | 4.67 | 198806191_SDN_LAN |
| Ron Darling | NYN | 3.65 | 198806210_PIT_NYN |
| Rick Reuschel | SFN | 3.35 | 198806210_SDN_SFN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Mike Smithson | BOS | -3.37 | 198806190_BOS_BAL |
| Mike Moore | SEA | -2.76 | 198806190_SEA_MIN |
| Pete Smith | ATL | -2.16 | 198806190_HOU_ATL |
| Dan Petry | ANA | -1.25 | 198806200_ANA_MIN |
| Dennis Rasmussen | SDN | -1 | 198806210_SDN_SFN |
Based on accumulated WAA for this season up to 1988-06-21.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.17 | Roger Clemens | 134.3 | BOS |
| +004+ | 4.46 | David Cone | 88.7 | NYN |
| +005+ | 4.36 | Greg Maddux | 121.7 | CHN |
| +006+ | 4.3 | John Tudor | 74.3 | SLN |
| +009+ | 3.84 | Teddy Higuera | 102.3 | MIL |
| +010+ | 3.69 | Larry McWilliams | 84.3 | SLN |
| +012+ | 3.48 | Ron Darling | 113.3 | NYN |
| +013+ | 3.38 | Bob Knepper | 81.7 | HOU |
| +016+ | 3.31 | Orel Hershiser | 111.3 | LAN |
| +019+ | 3.23 | Bob Walk | 95.3 | PIT |
| +020+ | 3.07 | Pascual Perez | 61 | WAS |
| +023+ | 3.04 | Frank Viola | 108.3 | MIN |
| +027+ | 2.92 | Kevin Gross | 113.3 | PHI |
| +029+ | 2.81 | Dave Stieb | 98.7 | TOR |
| +030+ | 2.81 | Dave LaPoint | 102 | CHA |
| +034+ | 2.67 | Mark Gubicza | 115.7 | KCA |
| +038+ | 2.53 | Paul Kilgus | 104 | TEX |
| +045+ | 2.29 | Tom Candiotti | 118.7 | CLE |
| +044+ | 2.29 | Jeff Russell | 73 | TEX |
| +047+ | 2.15 | Dennis Martinez | 103 | WAS |
| +048+ | 2.14 | Jose Rijo | 68 | CIN |
| +053+ | 2.08 | Chris Bosio | 115.3 | MIL |
| +055+ | 2.03 | Jim Deshaies | 85.3 | HOU |
| +056+ | 2.02 | Rick Reuschel | 96.7 | SFN |
| +058+ | 2 | Mike Scott | 109 | HOU |
_