Tags: Swimmer.
Mark Andrew Henderson (born November 14 1969) is an American former competition swimmer Olympic champion and former world record-holder. He is an Olympic gold medalist three-time World champion two-time Pan American Games champion four-time Pan Pacific champion and five-time U.S. National champion. He competed at the 1996 Olympic Games in Atlanta where he was the butterfly leg of the gold medal 4 x 100 medley relay which set the world Olympic American and U.S.