Jim Thorpe competed in the 1912 Summer Olympics. His sport of choice? The pentathlon and decathlon, where he finished first in eight of the 15 events, according to Men's Health. He then went on to play professional baseball AND football.
Hwang Woojin, of South Korea, and his horse Shearwater Oscar, fall down after the horse bucked after the starting bell sounded to start their run in the equestrian show jumping stage of the men's modern pentathlon at the 2012 Summer Olympics, Saturday, Aug. 11, 2012, in London.(AP Photo/Markus Schreiber)
Jim Thorpe, age 24, at the 1912 Olympics in Stockholm. Born on Indian territory to parents of mixed ancestry, Thorpe won gold in the pentathlon and the decathlon, dominating eight of the fifteen events. He was later was stripped of both medals when it was revealed that he had played professional baseball before the Olympics. After the games, he played professional football, baseball, and basketball until the age of 41, when the Great Depression ended his athletic career.