J.D. McDuffie at Islip Speedway
J.D. McDuffie has made 3 NASCAR Cup Series starts at Islip Speedway since 1966, with 0 wins, 0 top-10s and an average finish of 18.7.
Totals at Islip Speedway by series
| Series | Starts | Wins | Top 5 | Top 10 | Laps led | Avg finish | Avg start | Best finish |
|---|---|---|---|---|---|---|---|---|
| Cup Series | 3 | 0 | 0 | 0 | 0 | 18.7 | 19.3 | 16 |
Every start at Islip Speedway
| Date | Race | Series | Start | Finish | Laps led | Status |
|---|---|---|---|---|---|---|
| July 15, 1971 | 1971 Islip 250 | Winston Cup Series | 16 | 16 | 0 | Rear end |
| July 7, 1968 | 1968 Islip 300 | Grand National Series | 18 | 19 | 0 | Brakes |
| July 16, 1966 | 1966 Islip Speedway, July 16 | Grand National Series | 24 | 21 | 0 | Transmission |