William Quinn Buckner (born August 20, 1954) is a former American professional basketball player and coach. He played collegiate basketball for the Indiana University Hoosiers, and was selected by the Milwaukee Bucks with the 7th pick of the 1976 NBA Draft. He had a ten-year NBA career for three different teams (the Bucks, the Boston Celtics, and the Indiana Pacers). In 1984, he won an NBA title with the Celtics.
Buckner is one of only seven players in history to win an NCAA Championship, an NBA Championship, and an Olympic Gold Medal. He also was a State Champion while playing high school basketball in Illinois.
In addition to his playing career, Buckner was the head coach of the Dallas Mavericks for one year, from 1993 to 1994. Currently, Buckner is a color analyst for the Indiana Pacers television broadcast team on Fox Sports Indiana. Buckner also was the play-by-play announcer on 989 Sports line of college basketball games for several years. He is a member of Alpha Phi Alpha fraternity.