Billy played basketball for his father at Carmel High School before attending Butler. As a senior, he was named Indiana's Mr. Basketball. After three decades, his single season scoring average of 27.8 points per game and his career average of 24.1 points per game are still Butler records. Billy was named M.V.P. of the 1972 East-West College All Star Game. Following college, he played three years in the American Basketball Association. In 1997, Billy was inducted into the Indiana Basketball Hall of Fame.