John van Dyke raced flatwater kayaks. He competed for the United States at the 1972 Olympics and the 1966 and 1970 World Championships. Van Dyke also competed at the 1967 Pan American Games when canoeing was only a demonstration sport, but he won the K-2 1,000 metres and K-2 10K events, placing second in K-4. He was US Champion in K-1 in 1965 and 1967, in K-2 in 1967, with Peter Weigand, and in 1965-66 in K-4 with the Potomac Boat Club. Van Dyke graduated from George Washington University in 1962 and later earned a masters’ degree there in 1969, and a PhD in 1972. He worked as a research psychologist.