The night before the 2016 U.S. Olympic Trials, Nunn was curled in the fetal position, dealing with symptoms of a severe flu. He still managed to win the 50km race walk to make his third Olympic team. The two-time Olympian racewalker lives in Bonsall, California where he bakes and sells gourmet cookies with his daughter, Ella. Nunn attended Palomar College in San Marcos, California and is a Staff Sergeant in the U.S. Army's World Class Athlete Program. The 39-year-old also works with students at Bonsall High School as a track and field coach.