Bobby Williamson
Augusta
The three mile Augusta International Raceway road course was the scene of Fireball Robert's final victory in November 1963. In a twist unique to that era, late season events were often part of the following year. Thus, this victory counted as a "1964" win.
I believe Riverside had that situation also. Their two races was the first and last of the season, with both sometimes being in the same calender year.