| Starter | Tm | Tier | Game |
|---|---|---|---|
| Orel Hershiser | LAN | 7.07 | 198809230_LAN_SFN |
| Danny Jackson | CIN | 4.82 | 198809240_CIN_ATL |
| Allan Anderson | MIN | 3.32 | 198809220_MIN_ANA |
| Joe Magrane | SLN | 2.98 | 198809230_NYN_SLN |
| Bob Walk | PIT | 2.69 | 198809240_CHN_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rich Dotson | NYA | -4.27 | 198809240_BOS_NYA |
| Tom Glavine | ATL | -1.88 | 198809220_ATL_HOU |
| Charlie Lea | MIN | -1.62 | 198809230_MIN_ANA |
| Jack Armstrong | CIN | -1.22 | 198809220_SFN_CIN |
| Don Carman | PHI | -1.2 | 198809220_PHI_NYN |
Based on accumulated WAA for this season up to 1988-09-24.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 8.05 | Orel Hershiser | 257 | LAN |
| +005+ | 7.79 | David Cone | 216 | NYN |
| +009+ | 6.68 | Danny Jackson | 256.3 | CIN |
| +010+ | 6.66 | Teddy Higuera | 214 | MIL |
| +011+ | 6.64 | Frank Viola | 236 | MIN |
| +013+ | 6.54 | John Tudor | 196.3 | TOT |
| +016+ | 6.19 | Dennis Martinez | 234 | WAS |
| +019+ | 5.94 | Mark Gubicza | 253.3 | KCA |
| +022+ | 5.62 | Allan Anderson | 193.7 | MIN |
| +025+ | 5.43 | Joe Magrane | 156.7 | SLN |
| +030+ | 5.01 | Bob Walk | 213.3 | PIT |
| +032+ | 4.88 | Pascual Perez | 181.3 | WAS |
| +031+ | 4.88 | Jose Rijo | 162 | CIN |
| +034+ | 4.84 | Tim Leary | 219.7 | LAN |
| +037+ | 4.81 | Roger Clemens | 249 | BOS |
| +039+ | 4.47 | Don Robinson | 161.3 | SFN |
| +040+ | 4.09 | Dwight Gooden | 243.7 | NYN |
| +044+ | 3.9 | Mike Scott | 211.3 | HOU |
| +050+ | 3.67 | Bobby Ojeda | 190.3 | NYN |
| +059+ | 3.47 | Rick Reuschel | 230 | SFN |
| +062+ | 3.25 | Scott Terry | 119 | SLN |
| +064+ | 3.22 | Jeff Robinson | 172 | DET |
| +069+ | 3.13 | Ron Darling | 227.7 | NYN |
| +073+ | 2.95 | Dave LaPoint | 210 | TOT |
| +072+ | 2.95 | John Smiley | 194.3 | PIT |
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