He married fellow Olympic equestrian Mary Mairs in 1965. They were on the same Olympic show jumping team in 1964 and 1968, narrowly missing out on bronze in 1968 by 0.25 points. They retired to raise horses at Chado Farm, including the champion show jumper, Gem Twist, who won two Olympic silver medals and was named World's Best Horse at the 1990 World Equestrian Games in Stockholm. Gem Twist had an incredible career at the Grand Prix level. The gelding is the only horse to have won the "American Grand Prix Association Horse of the Year" title three times, and is regarded as having been one of the best show-jumpers in the history of the discipline. The Chapots had the horse cloned and began a breeding line from the clone.