I wouldnt. NFL 40 times are always faster than how track and field time their events. CJ realistically ran about a 4.45 or os by track timing standards. Like I mentioned with Jeff Demps. Demps would have beaten CJ easily in any type of race they ever ran. The 40 is an NFL thing, it isnt a track thing. There is no 40 yard sprint in track. With regards to Demps (now i get a 65 is different, people can slow down, accelerate, whatever so it isnt a perfect comparison). But averaging it out, Demps would have ran close to a 4 flat in a 40, where as CJ would have been closeer to a 7.5 in a 65 meters.