Michael Fred Phelps (born June 30, 1985) is an American swimmer, frequently cited as the greatest swimmer and one of the greatest Olympians of all time. He has won 14 career Olympic gold medals, the most by any Olympian. As of August 2, 2009, Phelps has broken thirty-seven world records in swimming.

Phelps holds the record for the most gold medals at a single Olympics, his eight at the 2008 Beijing Games surpassed American swimmer Mark Spitz's seven-gold performance at Munich in 1972.

Overall, Phelps has won 16 Olympic medals: six gold and two bronze at Athens in 2004, and eight gold at Beijing in 2008. In doing so he has twice equaled the record eight medals of any type at a single Olympics achieved by Soviet gymnast Alexander Dityatin at the 1980 Moscow Summer Games. His five golds in individual events tied the single Games record set by Eric Heiden in the 1980 Winter Olympics and equaled by Vitaly Scherbo at the 1992 Summer Games. Phelps career Olympic medal total is second only to the 18 Soviet gymnast Larissa Latynina won over three Olympics, including nine gold.