Jones is the first African-American to hold a world record (4×100-meter freestyle relay) in swimming. At the 2008 United States Olympic Trials, Jones broke the American record in the 50-meter freestyle with a time of 21.59. The record was subsequently broken the next day by Garrett Weber-Gale. At the 2008 Olympic Games in Beijing, China, he won a gold medal in the 4×100-meter freestyle relay in a world record time of 3:08.24 with Michael Phelps, Jason Lezak and Garrett Weber-Gale.