| Starter | Tm | Tier | Game |
|---|---|---|---|
| John Tudor | LAN | 4.99 | 198809180_LAN_CIN |
| Mark Gubicza | KCA | 3.59 | 198809160_KCA_OAK |
| Pascual Perez | WAS | 3.29 | 198809180_WAS_NYN |
| Joe Magrane | SLN | 3.13 | 198809170_SLN_CHN |
| Bob Walk | PIT | 3.12 | 198809180_PIT_PHI |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Willie Fraser | ANA | -7.11 | 198809160_TEX_ANA |
| Bert Blyleven | MIN | -6.22 | 198809160_CHA_MIN |
| Mike Smithson | BOS | -3.24 | 198809180_NYA_BOS |
| Tom Glavine | ATL | -2.34 | 198809172_SDN_ATL |
| Mike Campbell | SEA | -2.18 | 198809180_MIL_SEA |
Based on accumulated WAA for this season up to 1988-09-18.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +004+ | 7.62 | Frank Viola | 232.3 | MIN |
| +005+ | 7.48 | David Cone | 207 | NYN |
| +007+ | 7.15 | Teddy Higuera | 206 | MIL |
| +009+ | 6.67 | John Tudor | 192.3 | TOT |
| +010+ | 6.59 | Orel Hershiser | 239 | LAN |
| +011+ | 6.55 | Dennis Martinez | 228 | WAS |
| +016+ | 6.06 | Mark Gubicza | 244.7 | KCA |
| +017+ | 5.98 | Danny Jackson | 240 | CIN |
| +024+ | 5.16 | Allan Anderson | 185.7 | MIN |
| +027+ | 5 | Joe Magrane | 148.7 | SLN |
| +028+ | 4.99 | Jose Rijo | 160.3 | CIN |
| +033+ | 4.73 | Tim Leary | 212.7 | LAN |
| +036+ | 4.67 | Roger Clemens | 242 | BOS |
| +037+ | 4.6 | Bob Walk | 207.7 | PIT |
| +038+ | 4.56 | Don Robinson | 154.7 | SFN |
| +039+ | 4.48 | Pascual Perez | 176.3 | WAS |
| +042+ | 3.92 | Mike Scott | 203.3 | HOU |
| +043+ | 3.87 | Rick Reuschel | 222 | SFN |
| +045+ | 3.85 | Dwight Gooden | 235.3 | NYN |
| +048+ | 3.72 | Bobby Ojeda | 190.3 | NYN |
| +061+ | 3.27 | Jeff Robinson | 172 | DET |
| +069+ | 3.04 | Charlie Leibrandt | 222.3 | KCA |
| +071+ | 2.84 | Scott Terry | 111.3 | SLN |
| +073+ | 2.82 | Eric Show | 217.3 | SDN |
| +076+ | 2.79 | Doug Drabek | 203.7 | PIT |
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