Career
In addition to his Cup Series career, Jefferson also raced in the Winston West Series in a 1973 Mercury Cougar vehicle. That vehicle would eventually be refurbished into a 1979 Ford Granada and driven by National Association of Stock Car Auto Racing legends such as Derrike Cope, David Pearson, and Bobby Allison. Jefferson has competed in 1739 laps - the equivalent of 3,189.2 miles (5,1325 km).
This driver has also earned a grand total of $20,268 in total prize winnings ($79,14648 when adjusted for inflation) after starting an average of 18th place and finishing an average of 24th place.
His only DNQs were at the 1972 Miller High Life 500 and at the 1988 Checker 500.