September 15 - This day in Petty history 9/15/67 - Richard wins from the pole in the Maryland 300 at Beltsville Speedway for his 7th win in a row.9/15/68 - Richard wins the Hillsboro 150 at Orange Speedway in Hillsboro NC.

9/15/74 - Richard dominates the Delaware 500 at Dover by leading 491 of 500 laps and winning by 3 laps over the 2nd place finisher.