By the end of the 2008 Olympic Games in Beijing, China, U.S. swimmer Michael Phelps had already earned more gold medals than any athlete in the history of the Olympic Games. But at the 2012 Olympics in London, England, Michael won four more gold medals, plus two silver. With twenty-two medals in total-eighteen gold, two silver, and two bronze-from three Olympic Games, Michael is by far the most decorated athlete in Olympics history. Learn more about the swimmer from Maryland who became the Olympic Games' greatest champion.