| Starter | Tm | Tier | Game |
|---|---|---|---|
| Frank Viola | MIN | 8.28 | 198809150_CHA_MIN |
| David Cone | NYN | 6.94 | 198809150_CHN_NYN |
| Danny Jackson | CIN | 6.75 | 198809140_HOU_CIN |
| Orel Hershiser | LAN | 4.7 | 198809140_ATL_LAN |
| Mark Gubicza | KCA | 3.59 | 198809160_KCA_OAK |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Willie Fraser | ANA | -7.11 | 198809160_TEX_ANA |
| Bert Blyleven | MIN | -6.22 | 198809160_CHA_MIN |
| Rich Dotson | NYA | -3.75 | 198809140_NYA_CLE |
| Jim Clancy | TOR | -1.49 | 198809140_DET_TOR |
| Floyd Bannister | KCA | -1.21 | 198809140_KCA_ANA |
Based on accumulated WAA for this season up to 1988-09-16.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +004+ | 7.6 | Frank Viola | 232.3 | MIN |
| +005+ | 7.46 | David Cone | 207 | NYN |
| +006+ | 7.12 | Teddy Higuera | 206 | MIL |
| +010+ | 6.56 | Orel Hershiser | 239 | LAN |
| +011+ | 6.49 | Dennis Martinez | 228 | WAS |
| +013+ | 6.12 | John Tudor | 186.3 | TOT |
| +014+ | 6.04 | Mark Gubicza | 244.7 | KCA |
| +015+ | 5.95 | Danny Jackson | 240 | CIN |
| +025+ | 5.05 | Joe Magrane | 144.7 | SLN |
| +027+ | 4.97 | Pascual Perez | 170.3 | WAS |
| +029+ | 4.9 | Tim Leary | 207.7 | LAN |
| +031+ | 4.84 | Mike Scott | 199.7 | HOU |
| +034+ | 4.8 | Bob Walk | 200.3 | PIT |
| +036+ | 4.65 | Roger Clemens | 242 | BOS |
| +037+ | 4.64 | Allan Anderson | 177.7 | MIN |
| +038+ | 4.54 | Jose Rijo | 155.3 | CIN |
| +040+ | 4.14 | Don Robinson | 147.7 | SFN |
| +044+ | 3.76 | Dwight Gooden | 227.3 | NYN |
| +047+ | 3.7 | Bobby Ojeda | 190.3 | NYN |
| +050+ | 3.49 | Rick Reuschel | 213 | SFN |
| +060+ | 3.26 | Jeff Robinson | 172 | DET |
| +065+ | 3.02 | Charlie Leibrandt | 222.3 | KCA |
| +072+ | 2.9 | Jim Deshaies | 182 | HOU |
| +075+ | 2.82 | Scott Terry | 111.3 | SLN |
| +076+ | 2.8 | Greg Swindell | 219 | CLE |
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