Michael Fred Phelps II (born June 30, 1985) is an American competition swimmer and the most decorated Olympian of all time, with a total of 22 medals. Phelps also holds the all-time records for Olympic gold medals (18, double the second highest record holders), Olympic gold medals in individual events (11), and Olympic medals in individual events for a male (13). In winning eight gold medals at the 2008 Beijing Games, Phelps took the record for the most first-place finishes at any single Olympic Games. Five of those victories were in individual events, tying the single Games record. In the 2012 Summer Olympics in London, Phelps won four golds and two silver medals, making him the most successful athlete of the Games for the third Olympics in a row.

On July 31, 2012, Phelps won a silver medal in the 200-meter butterfly behind South African Chad le Clos by only 5/100ths of a second, and a gold medal in the 4×200-meter freestyle relay, thereby equaling and then surpassing Larisa Latynina to become the all-time record holder for most Olympic medals won. Latynina was present at the race and asked to be the presenter of Phelps's medal, but was told that Olympic rules would not allow it. She called Phelps deserving of the record.