He is the youngest U.S. Open champion in history. Together with Bill Tilden he won in 1918 at the age of 15 years and 139 days the men's doubles at the U.S. Open in Forest Hills. 1921 and 1922, he could win the title with Bill Tilden again. He was also successful in 1919 with Marion Zinderstein and 1924 with Helen Wills in the mixed doubles. In 1924 he won the men's singles at the Olympic Games. In the same year he won the men's doubles with Frank Hunter at Wimbledon. From 1927 he was active on the pro tour in tennis and won many more titles. In 1961, the induction into the International Tennis Hall of Fame.
Richards died of a heart attack in 1959.