Before High School, he played Little League baseball, but changed his sport after beginning swimming lessons at the direction of his mother.[2][3] At the University of Southern California, where he graduated in 1967, he swam for Hall of Fame and Olympic Coach Peter Daland.He received a gold medal at the Pan-American Games in 1963 in Sao Paulo, Brazil as a member of the medley relay team.[4][5] Craig represented the United States at the 1964 Summer Olympics in Tokyo, where he won a gold medal by swimming the breaststroke leg for the first-place U.S. team in the men's 4×100-meter medley relay.Craig and his teammates Thompson Mann (backstroke), Fred Schmidt (butterfly) and Steve Clark (freestyle) set a new medley relay world record of 3:58.4.