High Quality Content by WIKIPEDIA articles! Clifford Patrick Keen (June 13, 1901 – November 4, 1991) was an American coach who served as the head coach of the University of Michigan collegiate wrestling team from 1925 to 1970. He led the Michigan Wolverines to 13 Big Ten Conference championships, and coached 68 All-American wrestlers. In 1976, he was one of the initial inductees into the National Wrestling Hall of Fame.