Clark attended
Yale University, where he swam for coach
Philip Moriarty's
Yale Bulldogs swimming and diving team in
National Collegiate Athletic Association (NCAA) and
Ivy League competition. During his tenure at Yale, he won five NCAA titles. He also captured six individual and five AAU relay championships while swimming for the Santa Clara Swim Club, under Hall of Fame Coach
George Haines. Clark was the Santa Clara Club's first outstanding male swimmer, and the first of many outstanding swimmers mentored by Haines. A sprint specialist with exceptionally efficient flip turns, he set nine world records, but would have set more as short course records were not accepted for world records at the time. As a senior, he was the Yale swim team captain; he graduated from Yale with his bachelor's degree in 1964. In 2005, he donated one of his three Olympic gold medals to his alma mater. == 1960 Olympics ==