American competition swimmer who won five Olympic medals and set world records in the 50- and 100-meter butterfly, and the 100-meter freestyle.
He started in the 2000 Summer Olympics and almost won a bronze medal.
He set the world record in the 2005 World Aquatics Championships for the 100-meter butterfly.
He was born to Richard and Gail Crocker in 1982.
He was the former world record-holder for the butterfly until Michael Phelps surpassed it in 2009.