Didn't Dwayne Chambers try NFL as a wide receiver for a while when he was banned from racing, because of his speed? Thought that didn't go well! Maybe the same will happen with Usain. Would be great to try the offside trap against him!
I'm sure I saw a program about him growing up, and he used to play football a lot? With his pace and size, I would think he could be worth a look if he can actually control a football. He would probably make a good rugby Wing if he can catch!