Jeremy Mathew Wariner (born January 31, 1984) is a retired American track athlete specializing in the 400 meters. He has won four Olympic medals (three gold, one silver) and six World Championships medals. He is the fourth fastest competitor in the history of the 400 m event with a personal best of 43.45 seconds, behind Wayde van Niekerk (43.03 WR, 2016), Michael Johnson (43.18 WR, 1999) and Butch Reynolds (43.29 WR 1988) and the fifth fastest all-time mark when set in 2007.
Wariner was born in Irving, Texas. A successful college athlete at Baylor University, he won the 400 m and 4 × 400 m relay gold medals at his first Olympics in Athens 2004. He followed this with two gold medals at the 2005 World Championships in the same events. He remained undefeated in the 400 m event during the 2006 ÅF Golden League, earning him the $250,000 jackpot. He remained World Champion in the 400 m individual and relay events at the 2007 Osaka World Championships, earning him the 2007 Best Male Track Athlete ESPY Award. He won the 4×400 m relay gold medal at the 2008 Beijing Olympics, but took silver in the 400 m, finishing behind countryman LaShawn Merritt. Wariner picked up the silver medal in the 2009 World Championships, again finishing second to Merritt.