| Starter | Tm | Tier | Game |
|---|---|---|---|
| David Cone | NYN | 7.82 | 198809300_SLN_NYN |
| Frank Viola | MIN | 6.33 | 198809300_ANA_MIN |
| Ted Higuera | MIL | 5.61 | 198810010_MIL_OAK |
| Mark Gubicza | KCA | 5.51 | 198810010_CHA_KCA |
| John Tudor | LAN | 5.25 | 198809300_SFN_LAN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Willie Fraser | ANA | -7.79 | 198810020_ANA_MIN |
| Mike Campbell | SEA | -4.76 | 198810010_TEX_SEA |
| Jay Tibbs | BAL | -3.01 | 198810010_BAL_TOR |
| Tommy John | NYA | -1.49 | 198810010_NYA_DET |
| Jim Clancy | TOR | -1.47 | 198810010_BAL_TOR |
Based on accumulated WAA for this season up to 1988-10-02.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 8.82 | Orel Hershiser | 267 | LAN |
| +006+ | 8.09 | David Cone | 231.7 | NYN |
| +010+ | 6.77 | Teddy Higuera | 227.3 | MIL |
| +011+ | 6.72 | Mark Gubicza | 270 | KCA |
| +014+ | 6.4 | Allan Anderson | 203 | MIN |
| +016+ | 6.36 | Frank Viola | 250 | MIN |
| +019+ | 6.24 | John Tudor | 197.7 | TOT |
| +021+ | 6.01 | Joe Magrane | 165.7 | SLN |
| +022+ | 5.94 | Danny Jackson | 262.3 | CIN |
| +027+ | 5.29 | Roger Clemens | 264 | BOS |
| +028+ | 5.26 | Pascual Perez | 188.3 | WAS |
| +029+ | 5.2 | Don Robinson | 177 | SFN |
| +031+ | 5.14 | Dennis Martinez | 236.3 | WAS |
| +033+ | 5 | Bob Walk | 213.3 | PIT |
| +035+ | 4.88 | Jose Rijo | 162 | CIN |
| +042+ | 4.03 | Tim Leary | 228.3 | LAN |
| +049+ | 3.76 | Mike Scott | 218.3 | HOU |
| +051+ | 3.67 | Bobby Ojeda | 190.3 | NYN |
| +055+ | 3.57 | Dave Stieb | 207.3 | TOR |
| +057+ | 3.51 | Rick Reuschel | 245 | SFN |
| +061+ | 3.38 | Charlie Leibrandt | 244 | KCA |
| +064+ | 3.27 | Jim Deshaies | 207.7 | HOU |
| +065+ | 3.26 | Doug Drabek | 220 | PIT |
| +067+ | 3.22 | Greg Swindell | 241.3 | CLE |
| +066+ | 3.22 | Tim Belcher | 179.7 | LAN |
_