Tracy Caulkins is a three-time Olympic gold medalist and one of the most diverse swimmers to ever enter the pool. She is known for her versatility, specifically being able to master and compete in all four competitive swimming strokes: the butterfly, breaststroke, backstroke and freestyle.
What's even more notable about Caulkins is that many consider her the best swimmer in the history of the sport, male or female. By the time she retired in 1984, she had set five world records and 63 U.S. records, more than any other American swimmer, male or female.