I hear people throwing out the Watt comparisons, but if I was forced to make a comparison of this kid to an NFL player, I'd say Kyle Vanden Bosch. He didn't have necessarily have elite measurables, but the guy was a football player with a relentless motor.
Of course, Butcher is still a young guy and will make his own legacy (plus I'm only drawing from highlight videos/evaluations I've read). But, I think butcher will be big for us because of his motor and near-elite measurables. I hope he can EE. If he can, he could find himself contributing and taking on a Corey Vereen-esque role as a true freshman.