| Starter | Tm | Tier | Game |
|---|---|---|---|
| Orel Hershiser | LAN | 8.32 | 198809280_LAN_SDN |
| David Cone | NYN | 7.82 | 198809300_SLN_NYN |
| Frank Viola | MIN | 6.33 | 198809300_ANA_MIN |
| Danny Jackson | CIN | 5.64 | 198809280_CIN_SFN |
| Roger Clemens | BOS | 3.49 | 198809300_BOS_CLE |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bert Blyleven | MIN | -7.95 | 198809280_OAK_MIN |
| Rich Dotson | NYA | -4.15 | 198809290_NYA_BAL |
| Tom Glavine | ATL | -1.77 | 198809280_HOU_ATL |
| Rich Yett | CLE | -1.27 | 198809300_BOS_CLE |
| Mark Williamson | BAL | -1.11 | 198809290_NYA_BAL |
Based on accumulated WAA for this season up to 1988-09-30.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 8.83 | Orel Hershiser | 267 | LAN |
| +005+ | 8.1 | David Cone | 231.7 | NYN |
| +010+ | 6.82 | Teddy Higuera | 220.7 | MIL |
| +011+ | 6.69 | Mark Gubicza | 262.3 | KCA |
| +013+ | 6.42 | Allan Anderson | 203 | MIN |
| +016+ | 6.38 | Frank Viola | 250 | MIN |
| +020+ | 6.23 | John Tudor | 197.7 | TOT |
| +021+ | 6 | Joe Magrane | 165.7 | SLN |
| +022+ | 5.96 | Danny Jackson | 262.3 | CIN |
| +026+ | 5.28 | Roger Clemens | 264 | BOS |
| +027+ | 5.27 | Pascual Perez | 188.3 | WAS |
| +031+ | 5.14 | Dennis Martinez | 236.3 | WAS |
| +032+ | 4.98 | Bob Walk | 213.3 | PIT |
| +034+ | 4.89 | Jose Rijo | 162 | CIN |
| +038+ | 4.42 | Don Robinson | 168 | SFN |
| +047+ | 3.82 | Tim Leary | 223.3 | LAN |
| +049+ | 3.77 | Mike Scott | 218.3 | HOU |
| +052+ | 3.68 | Bobby Ojeda | 190.3 | NYN |
| +057+ | 3.59 | Dave Stieb | 207.3 | TOR |
| +059+ | 3.4 | Charlie Leibrandt | 244 | KCA |
| +063+ | 3.3 | Jim Deshaies | 203 | HOU |
| +064+ | 3.29 | Doug Drabek | 218 | PIT |
| +066+ | 3.24 | Greg Swindell | 241.3 | CLE |
| +067+ | 3.24 | Rick Reuschel | 237 | SFN |
| +069+ | 3.2 | Ron Darling | 235.7 | NYN |
_