FILE - In this Aug. 3, 2012, file photo, United States' Michael Phelps displays his gold medal for the men's 100-meter butterfly swimming final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London. Phelps is coming out of retirement, the first step toward possibly swimming at the 2016 Rio Olympics. Bob Bowman, the swimmer's longtime coach, told The Associated Press on Monday, April 14, 2014, that Phelps is entered in three events — the 50- and 100-meter freestyles and the 100 butterfly at his first meet since the 2012 London Games at a meet in Mesa, Ariz., on April 24-26. (AP Photo/Matt Slocum, File)