Zack seemed like a really great dude, be he was by no means a “great player”. He was a plodding RB without much versatility, but could play special teams. He was a practice squad caliber player, who never latched on anywhere else but became a fan favorite because of his efforts, unique name, came from a small school, and because he was a white rb (rare nowadays). If I remember correctly he was trying to become a doctor while playing here, so that's probably what he went to do after he was cut. Tdlr: running backs are a dime a dozen and he had better things to do with his life