He participated in only the 1914 olympics and won the pentathlon and the decathlon. After that the guy needed to make a living (I understand he was a big drinker), so he went on to play professional football, baseball, and basketball. If he could have been a career Olympian, like Phelps, who knows how many medals he would have won.
I wonder if that fairy sprinter from 2200 years ago could have played 3 American professional sports? Surely not Michael Phelps.