Finished 2nd at the 2016 US Olympic Swimming Trials in the 400m freestyle.
Won 17 medals: nine gold, six silver, and two bronze from the Summer Olympics, the FINA World Championships, the Pan Pacific Championships, and the Pan American Games all together.
Attended the University of Iowa and swam for the Iowa Hawkeyes swimming and diving team in National Collegiate Athletic Association (NCAA) and Big Ten Conference competition during the 2007-2008 and 2008-2009 seasons.
Son of Patrick and Jeanne Dwyer.
In the final of the 400-meter freestyle at the 2012 London Olympics, placed 5th with a time of 3:46.39.