If he's been clocked at a 10.6 100m, in Track, then he clearly has 10.6 speed. It's completely different. You're not going to see a 10.6 in football obviously. Track is straight line speed. Maybe that's what he excels at. Change of direction etc, will obviously change that. I haven't seen his track highlights, but he may not be a strong starter. He may get stronger throughout the race. Therefore, it may not show up in his FOOTBALL highlight film.
You're also the dude that posted Avery Huff is a "Freak" and was impressed by his "closing speed" as he covered a receiver on a half *** drag route.