J.D. McDuffie at Dover
J.D. McDuffie has made 41 NASCAR Cup Series starts at Dover since 1969, with 0 wins, 3 top-10s and an average finish of 22.7.
Totals at Dover by series
| Series | Starts | Wins | Top 5 | Top 10 | Laps led | Avg finish | Avg start | Best finish |
|---|
| Cup Series | 41 | 0 | 1 | 3 | 14 | 22.7 | 26.5 | 5 |
| O'Reilly Series | 2 | 0 | 0 | 0 | 0 | 15.5 | 22 | 15 |
Every start at Dover
| Date | Race | Series | Start | Finish | Laps led | Status |
|---|
| June 2, 1991 | 1991 Budweiser 500 | Winston Cup Series | 35 | 31 | 0 | Crash |
| September 16, 1990 | 1990 Peak AntiFreeze 500 | Winston Cup Series | 39 | 40 | 0 | Transmission |
| June 3, 1990 | 1990 Budweiser 500 | Winston Cup Series | 34 | 25 | 0 | Valve |
| September 17, 1989 | 1989 Peak Performance 500 | Winston Cup Series | 39 | 34 | 0 | Engine |
| June 5, 1988 | 1988 Budweiser 500 | Winston Cup Series | 39 | 25 | 1 | Running |
| September 20, 1987 | 1987 Delaware 500 | Winston Cup Series | 38 | 28 | 0 | Engine |
| May 31, 1987 | 1987 Budweiser 500 | Winston Cup Series | 38 | 23 | 0 | Engine |
| September 14, 1986 | 1986 Delaware 500 | Winston Cup Series | 35 | 37 | 0 | Engine |
| May 18, 1986 | 1986 Budweiser 500 | Winston Cup Series | 23 | 20 | 0 | Engine |
| September 15, 1985 | 1985 Delaware 500 | Winston Cup Series | 32 | 28 | 0 | Engine |
| May 19, 1985 | 1985 Budweiser 500 | Winston Cup Series | 26 | 31 | 0 | Valve |
| September 16, 1984 | 1984 Delaware 500 | Winston Cup Series | 38 | 16 | 0 | Running |
| May 20, 1984 | 1984 Budweiser 500 | Winston Cup Series | 30 | 33 | 0 | Engine |
| September 18, 1983 | 1983 Budweiser 500 | Winston Cup Series | 35 | 36 | 0 | Engine |
| May 15, 1983 | 1983 Mason-Dixon 500 | Winston Cup Series | 28 | 23 | 0 | Engine |
| May 14, 1983 | 1983 Sportsman 200 | Budweiser Late Model Sportsman Series | 26 | 15 | 0 | Running |
| September 19, 1982 | 1982 CRC Chemicals 500 | Winston Cup Series | 28 | 13 | 0 | Running |
| May 16, 1982 | 1982 Mason-Dixon 500 | Winston Cup Series | 28 | 27 | 0 | Engine |
| May 15, 1982 | 1982 Sportsman 200 | Budweiser Late Model Sportsman Series | 18 | 16 | 0 | Engine |
| September 20, 1981 | 1981 CRC Chemicals 500 | Winston Cup Series | 26 | 28 | 0 | Engine |
| May 17, 1981 | 1981 Mason-Dixon 500 | Winston Cup Series | 28 | 23 | 0 | Engine |
| September 14, 1980 | 1980 CRC Chemicals 500 | Winston Cup Series | 25 | 38 | 0 | Engine |
| May 18, 1980 | 1980 Mason-Dixon 500 | Winston Cup Series | 21 | 33 | 0 | Engine |
| September 16, 1979 | 1979 CRC Chemicals 500 | Winston Cup Series | 20 | 27 | 0 | Engine |
| May 20, 1979 | 1979 Mason-Dixon 500 | Winston Cup Series | 8 | 13 | 3 | Crash |
| September 17, 1978 | 1978 Delaware 500 | Winston Cup Series | 1 | 33 | 10 | Engine |
| May 21, 1978 | 1978 Mason-Dixon 500 | Winston Cup Series | 12 | 34 | 0 | Oil pan |
| September 18, 1977 | 1977 Delaware 500 | Winston Cup Series | 13 | 12 | 0 | Running |
| May 15, 1977 | 1977 Mason-Dixon 500 | Winston Cup Series | 12 | 13 | 0 | Running |
| September 19, 1976 | 1976 Delaware 500 | Winston Cup Series | 22 | 7 | 0 | Running |
| May 16, 1976 | 1976 Mason-Dixon 500 | Winston Cup Series | 31 | 15 | 0 | Running |
| September 14, 1975 | 1975 Delaware 500 | Winston Cup Series | 28 | 8 | 0 | Running |
| May 18, 1975 | 1975 Mason-Dixon 500 | Winston Cup Series | 16 | 18 | 0 | Engine |
| September 15, 1974 | 1974 Delaware 500 | Winston Cup Series | 28 | 12 | 0 | Running |
| May 19, 1974 | 1974 Mason-Dixon 500 | Winston Cup Series | 24 | 11 | 0 | Running |
| September 16, 1973 | 1973 Delaware 500 | Winston Cup Series | 13 | 5 | 0 | Running |
| June 3, 1973 | 1973 Mason-Dixon 500 | Winston Cup Series | 27 | 19 | 0 | Engine |
| September 17, 1972 | 1972 Delaware 500 | Winston Cup Series | 34 | 24 | 0 | Engine |
| June 4, 1972 | 1972 Mason-Dixon 500 | Winston Cup Series | 32 | 11 | 0 | Running |
| October 17, 1971 | 1971 Delaware 500 | Winston Cup Series | 31 | 26 | 0 | Overheating |
| June 6, 1971 | 1971 Mason-Dixon 500 | Winston Cup Series | 29 | 12 | 0 | Running |
| September 20, 1970 | 1970 Mason-Dixon 300 | Grand National Series | 23 | 25 | 0 | Engine |
| July 6, 1969 | 1969 Mason-Dixon 300 | Grand National Series | 16 | 12 | 0 | Running |