William Kirby Bryan (born June 21, 1955) is a former American football player in the National Football League (NFL). He was drafted by the Denver Broncos in the fourth round of the 1977 NFL Draft out of Duke University. Bryan holds the second-longest NFL career for Duke graduates, behind only to Sonny Jurgensen. He went on to play for the Broncos from 1977 to 1988 and was All-Pro in 1985. In his career as a member of the Broncos, Bryan played 153 games.