Chris Johnson ran a 4.24 in the 40-yard dash at the 2008 NFL Scouting Combine and has gained over 7,000 yards in his career. Johnson thinks he possesses the speed to beat Olympic record-holder Usain Bolt of Jamaica, who ran the 100 meters in 9.63 seconds for the gold medal in this year's summer games. "I feel like if I would have kept training for track I'd have a chance, but I play football and he runs track, so it's totally different," Johnson said. "I think I could still probably beat him in the 40. If I actually trained for the distance he trained for, I think I'd have a chance."