feelosofer
#ninergang
A similar question was asked years ago and the answer is still the same. There a lots of accomplished track athletes who tried to play football over the years, and didn't pan out. Straight line speed is only one aspect of the game, Usain Bold would have to learn lateral movement, how to catch, how to block, at least a partial route tree, common play terms, formations, motions/audibles, take a hit. He actually wouldn't have to bulk up, his size actually more than ideal for the NFL since he's already 200 lbs and 6'5, but that being said, he makes elite QB money without debilitating himself in the process.
