Michael William Krzyzewski ( ; nicknamed "Coach K"; born February 13, 1947) is an American college basketball coach and former player. Since 1980, he has served as the head men's basketball coach at Duke University. At Duke, Krzyzewski has led the Blue Devils to five NCAA Championships, 12 Final Fours, 12 ACC regular season titles, and 14 ACC Tournament championships. Among men's college basketball coaches, only UCLA's John Wooden, with 10, has won more NCAA Championships