Michael Fred Phelps (born June 30, 1985) is an American swimmer. He has won 14 career Olympic gold medals, the most by any Olympian. As of August 2008, he also holds seven world records in swimming. Phelps holds the record for the most gold medals won at a single Olympics with the eight golds he won at the 2008 Olympic Games. With this record, he surpassed Mark Spitz, who was also a swimmer and had held the previous gold medal total with the seven that he won at the 1972 Olympic Games. He is simply incredible!