| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tim Leary | LAN | 4.99 | 198809020_LAN_NYN |
| Mark Gubicza | KCA | 4.74 | 198809010_KCA_MIN |
| Mike Scott | HOU | 3.47 | 198809020_SLN_HOU |
| Allan Anderson | MIN | 2.88 | 198809020_KCA_MIN |
| Pascual Perez | WAS | 2.74 | 198809030_SFN_WAS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bert Blyleven | MIN | -4.11 | 198809010_KCA_MIN |
| Tom Glavine | ATL | -3.26 | 198809020_PIT_ATL |
| Jim Clancy | TOR | -1.82 | 198809030_TEX_TOR |
| Oswaldo Peraza | BAL | -1.74 | 198809020_BAL_SEA |
| Curt Young | OAK | -1.68 | 198809020_NYA_OAK |
Based on accumulated WAA for this season up to 1988-09-03.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 7.43 | Frank Viola | 214.7 | MIN |
| +006+ | 6.43 | David Cone | 184 | NYN |
| +007+ | 6.11 | Teddy Higuera | 190 | MIL |
| +008+ | 6.1 | Dennis Martinez | 212 | WAS |
| +009+ | 5.9 | Mark Gubicza | 219 | KCA |
| +012+ | 5.73 | Danny Jackson | 216.7 | CIN |
| +015+ | 5.28 | John Tudor | 173.3 | TOT |
| +019+ | 5.02 | Roger Clemens | 220 | BOS |
| +020+ | 5.02 | Mike Scott | 185.7 | HOU |
| +021+ | 4.97 | Joe Magrane | 133.3 | SLN |
| +022+ | 4.92 | Tim Leary | 194.3 | LAN |
| +028+ | 4.75 | Pascual Perez | 154.3 | WAS |
| +032+ | 4.5 | Bob Walk | 185.3 | PIT |
| +034+ | 4.36 | Orel Hershiser | 212 | LAN |
| +037+ | 4.22 | Allan Anderson | 164.7 | MIN |
| +042+ | 3.72 | Don Robinson | 131.7 | SFN |
| +043+ | 3.5 | Jeff Robinson | 172 | DET |
| +044+ | 3.5 | Jose Rijo | 142.3 | CIN |
| +047+ | 3.32 | Dwight Gooden | 213.3 | NYN |
| +051+ | 3.23 | Rick Reuschel | 191 | SFN |
| +055+ | 3.07 | Dave LaPoint | 182.7 | TOT |
| +061+ | 2.93 | Greg Harris | 93 | PHI |
| +062+ | 2.93 | Bobby Ojeda | 168 | NYN |
| +065+ | 2.9 | Jim Deshaies | 171 | HOU |
| +067+ | 2.86 | Doug Drabek | 183.3 | PIT |
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