Michael Phelps

Associated Press
FILE - In this Friday, Aug. 3, 2012 file photo, United States' Michael Phelps, left, touches the wall as South Africa's Chad le Clos closes in for second place during the men's 100-meter butterfly final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London. (AP Photo/Mark J. Terrill, File)

View gallery

172 photos

Olympic champion Michael Phelps has announced his intention to retire after the London Olympics. 

View Comments