| Starter | Tm | Tier | Game |
|---|---|---|---|
| Frank Viola | MIN | 8.34 | 198809200_MIN_OAK |
| David Cone | NYN | 7.73 | 198809200_PHI_NYN |
| Ted Higuera | MIL | 6.17 | 198809200_MIL_ANA |
| Dennis Martinez | WAS | 5.66 | 198809201_WAS_CHN |
| Mark Gubicza | KCA | 4.7 | 198809210_KCA_SEA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Willie Fraser | ANA | -6.92 | 198809210_MIL_ANA |
| Bert Blyleven | MIN | -6.88 | 198809210_MIN_OAK |
| Tom Glavine | ATL | -1.88 | 198809220_ATL_HOU |
| Tommy John | NYA | -1.54 | 198809210_BAL_NYA |
| Jack Morris | DET | -1.47 | 198809200_CLE_DET |
Based on accumulated WAA for this season up to 1988-09-22.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +004+ | 7.82 | David Cone | 216 | NYN |
| +006+ | 7.32 | Orel Hershiser | 248 | LAN |
| +008+ | 6.77 | Teddy Higuera | 214 | MIL |
| +009+ | 6.69 | Frank Viola | 236 | MIN |
| +011+ | 6.65 | John Tudor | 192.3 | TOT |
| +014+ | 6.18 | Dennis Martinez | 234 | WAS |
| +015+ | 6.16 | Danny Jackson | 247.3 | CIN |
| +018+ | 5.98 | Mark Gubicza | 253.3 | KCA |
| +020+ | 5.66 | Allan Anderson | 193.7 | MIN |
| +027+ | 4.98 | Joe Magrane | 148.7 | SLN |
| +028+ | 4.98 | Jose Rijo | 160.3 | CIN |
| +030+ | 4.88 | Tim Leary | 219.7 | LAN |
| +031+ | 4.86 | Roger Clemens | 249 | BOS |
| +036+ | 4.58 | Bob Walk | 207.7 | PIT |
| +038+ | 4.5 | Don Robinson | 161.3 | SFN |
| +039+ | 4.44 | Pascual Perez | 176.3 | WAS |
| +043+ | 3.9 | Mike Scott | 203.3 | HOU |
| +045+ | 3.83 | Dwight Gooden | 235.3 | NYN |
| +047+ | 3.7 | Bobby Ojeda | 190.3 | NYN |
| +057+ | 3.51 | Rick Reuschel | 230 | SFN |
| +063+ | 3.27 | Scott Terry | 119 | SLN |
| +065+ | 3.24 | Jeff Robinson | 172 | DET |
| +067+ | 3.16 | Ron Darling | 227.7 | NYN |
| +071+ | 3 | Dave LaPoint | 210 | TOT |
| +070+ | 3 | John Smiley | 194.3 | PIT |
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