I think he's going to have to be a standout on special teams to not end up on the practice squad. With runnings backs, it's not just about running ability, it's about trust. They aren't putting Romo in his hands anytime soon.
There are two things that impress me about Zeke, and neither of them was revealed at the combine. 1) His vision is so special, he makes it look easy. 2) From a young age, he dedicated himself to becoming a standout blocker because he noticed none of the other backs wanted to do it.