Michael Phelps is the most decorated Olympian of all time, with (at this writing) 25 medals to his name. He is also a golfer, and holds the distinction of sinking what is most likely the longest putt ever recorded on television:
The 53 yard putt was for Eagle at the pro-am of the 2012 Alfred Dunhill Links Championship.
It is also worth paying attention to the numbers at the top of the screen. That putt from the front of the green was his second shot on a par 4, which means he had a heckuva drive.
Phelps golf interest makes sense. He attended the University of Michigan, and Michigan is a golf-mad state.