| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dennis Martinez | WAS | 5.76 | 198809110_NYN_WAS |
| Mark Gubicza | KCA | 4.83 | 198809110_OAK_KCA |
| John Tudor | LAN | 4.42 | 198809130_ATL_LAN |
| Joe Magrane | SLN | 4.14 | 198809120_SLN_WAS |
| Mike Scott | HOU | 3.13 | 198809130_HOU_CIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bert Blyleven | MIN | -6.24 | 198809110_MIN_CHA |
| Mike Smithson | BOS | -3.17 | 198809130_BAL_BOS |
| Ted Power | DET | -2.38 | 198809130_DET_TOR |
| Tom Glavine | ATL | -1.75 | 198809120_ATL_LAN |
| Don Carman | PHI | -1.41 | 198809120_CHN_PHI |
Based on accumulated WAA for this season up to 1988-09-13.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 7.87 | Frank Viola | 231.3 | MIN |
| +005+ | 7.15 | Teddy Higuera | 206 | MIL |
| +006+ | 7.09 | David Cone | 200 | NYN |
| +007+ | 6.99 | Danny Jackson | 234.7 | CIN |
| +009+ | 6.56 | Dennis Martinez | 228 | WAS |
| +013+ | 6.13 | John Tudor | 186.3 | TOT |
| +015+ | 5.8 | Orel Hershiser | 230 | LAN |
| +020+ | 5.29 | Mark Gubicza | 235.7 | KCA |
| +021+ | 5.18 | Roger Clemens | 235.7 | BOS |
| +025+ | 5.06 | Joe Magrane | 144.7 | SLN |
| +027+ | 5.02 | Pascual Perez | 170.3 | WAS |
| +028+ | 4.92 | Tim Leary | 207.7 | LAN |
| +031+ | 4.86 | Bob Walk | 200.3 | PIT |
| +030+ | 4.86 | Mike Scott | 199.7 | HOU |
| +036+ | 4.59 | Allan Anderson | 177.7 | MIN |
| +038+ | 4.57 | Jose Rijo | 155.3 | CIN |
| +040+ | 3.98 | Don Robinson | 140.7 | SFN |
| +041+ | 3.8 | Dwight Gooden | 227.3 | NYN |
| +047+ | 3.6 | Bobby Ojeda | 184 | NYN |
| +049+ | 3.52 | Rick Reuschel | 213 | SFN |
| +051+ | 3.49 | Dave LaPoint | 198.7 | TOT |
| +055+ | 3.28 | Jeff Robinson | 172 | DET |
| +065+ | 3.02 | John Smiley | 181.7 | PIT |
| +070+ | 2.93 | Dave Stewart | 242.3 | OAK |
| +072+ | 2.91 | Jim Deshaies | 182 | HOU |
_