Jeffery Barnard Demps (born January 8, 1990) is an American track and field athlete and former American football running back. He attended the University of Florida, where he was a running back for the Florida Gators football team and a sprinter for the Florida Gators track and field team. He is the only Florida Gator athlete to have won national championships in two sports with his 2009 BCS National Championship and multiple indoor and outdoor track titles over his four-year career. Demps matched the 100 meters world junior record with a time of 10.01 seconds in June 2008.