One of the most decorated U.S. Olympians, he won eight gold medals in swimming events from 1984 to 1992.
He was a water polo player in his childhood, and then found a talent for sprint swimming in his teens, both of which he nurtured through his college years.
He won two Olympic silver medals, one bronze, and thirteen gold medals.
He had three children with wife Kirsten Metzger, who he married in 1995.
Michael Phelps was one of the few Olympics swimmers to have more medals than him.