American swimmer who won a gold medal as part of the U.S. 4x200-meter freestyle relay team at the 2012 and 2016 Summer Olympics.
In 2007, he started swimming for the Iowa Hawkeyes while studying at the University of Iowa.
He won a silver medal at the 2013 World Aquatics Championships in Barcelona. He won a bronze medal in the individual 200-meter freestyle in 2016.
His mother, Jeanne Dwyer, was also a competitive swimmer. He has been dating Instagram star Chase Carter.
He and Michael Phelps were teammates at the 2012 and 2016 Olympics.