John Michael Plumb is a seven-time Olympian and six-time medalist in the equestrian sport of three-day eventing. Born in Islip, New York, Plumb was raised by parents who were both Equestrians, and he fell in love with the sport at a young age. In 1959, Plumb began his international competitive three-day event career at the Pan American Games in Chicago. He would go on to win three Pan American Games gold medals throughout his career. Beginning with his first Olympic Games in 1960, Plumb was selected to the U.S. team in every Games through 1984, and then again in 1992, becoming the U.S. Olympic athlete with the greatest number of appearances in any sport at the Games. He won his first Olympic medal at the Olympic Games Tokyo 1964 in team eventing, winning silver on a horse he had never previously ridden in competition. Plumb would win five more Olympic medals throughout his career, two gold and three silver, in team eventing and individual evening. After retiring from competitive eventing, Plumb was inducted into the U.S. Eventing Association Hall of Fame. He was also the first Equestrian inducted into the U.S. Olympic Hall of Fame.