Sunday, July 6, 1969 – NASCAR’s premier series added a new venue to the schedule but at the end of the day it was a familiar face in the winner’s circle – Richard Petty captured the inaugural Mason-Dixon 300 at Dover International Speedway. It was the fifth win of the season for Petty, who had a six-lap advantage on runner-up Sonny Hutchins at the finish.
• The race was contested just two days after teams had run the Firecracker 400 at Daytona International Speedway.
• Because it was a new venue, tire issues were frequent – David Pearson was leading the race when he suffered a tire failure on lap 64 and sent his car hard into the wall. Lee Roy Yarbrough battled Petty for the top spot for nearly 100 laps before a blown tire sent the Junior Johnson-owned entry to the garage and out of contention.
• Yarbrough’s entry was dealt a mechanical blow during practice when the drive shaft in his entry failed. Pearson’s Holman-Moody group stepped up and provided the Johnson team with the necessary parts to make repairs.
• Four days after the Dover debut, the series was competing again, this time at Thompson (Conn.) Speedway.