| Starter | Tm | Tier | Game |
|---|---|---|---|
| Danny Jackson | CIN | 5.84 | 198809090_CIN_LAN |
| John Tudor | LAN | 3.86 | 198809080_HOU_LAN |
| Mike Scott | HOU | 3.55 | 198809070_HOU_LAN |
| Joe Magrane | SLN | 3.36 | 198809070_PHI_SLN |
| Pascual Perez | WAS | 3.26 | 198809080_WAS_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rich Dotson | NYA | -3.86 | 198809090_DET_NYA |
| Tom Glavine | ATL | -2.36 | 198809070_ATL_SFN |
| Ted Power | DET | -2.2 | 198809080_DET_NYA |
| Jim Clancy | TOR | -1.96 | 198809090_TOR_BAL |
| Floyd Bannister | KCA | -1.83 | 198809070_ANA_KCA |
Based on accumulated WAA for this season up to 1988-09-09.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 8.09 | Frank Viola | 223.3 | MIN |
| +005+ | 7.02 | Danny Jackson | 234.7 | CIN |
| +007+ | 6.62 | Teddy Higuera | 197 | MIL |
| +009+ | 6.55 | Dennis Martinez | 220 | WAS |
| +010+ | 6.36 | David Cone | 191 | NYN |
| +013+ | 6.15 | Mark Gubicza | 227.7 | KCA |
| +015+ | 5.72 | John Tudor | 181.3 | TOT |
| +016+ | 5.71 | Joe Magrane | 142.3 | SLN |
| +020+ | 5.35 | Tim Leary | 202.3 | LAN |
| +022+ | 5.07 | Orel Hershiser | 221 | LAN |
| +026+ | 4.84 | Allan Anderson | 172.7 | MIN |
| +029+ | 4.78 | Mike Scott | 193.7 | HOU |
| +032+ | 4.49 | Pascual Perez | 161.3 | WAS |
| +034+ | 4.45 | Roger Clemens | 226.7 | BOS |
| +037+ | 4.2 | Bob Walk | 192.3 | PIT |
| +040+ | 4.01 | Don Robinson | 140.7 | SFN |
| +041+ | 3.98 | Jose Rijo | 148.3 | CIN |
| +046+ | 3.45 | Dwight Gooden | 220.3 | NYN |
| +048+ | 3.4 | Jeff Robinson | 172 | DET |
| +055+ | 3.17 | Rick Reuschel | 206 | SFN |
| +056+ | 3.16 | Greg Swindell | 210.3 | CLE |
| +061+ | 3 | Dave Stewart | 242.3 | OAK |
| +062+ | 2.99 | Dave LaPoint | 189.7 | TOT |
| +069+ | 2.86 | Bobby Ojeda | 175 | NYN |
| +072+ | 2.83 | John Smiley | 176.7 | PIT |
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