Doug graduated from Centerburg High School in Central Ohio in 1962 and continued his education at the University of Kentucky.

He was chosen by the Wigman of America to be a National High School All American All Star player which earned him the right to play in the All-Star game in Dallas, Texas.

Drafted in the 5th round, first pick by the Minnesota Vikings, he appeared in 148 career regular season games.

Along with Grady Alderman, Mick Tingelhoff, Jim Vellone and Milt Sunde, he formed a highly-effective offensive line which played a significant role in the Vikings reaching Super Bowl IV in 1970.

Following his football career, Davis worked as a highly respected national sales director for a water technology company for 25 years in Sarasota FL.