Surely Fitz is far and away RB1. Fitz will be in there on some third downs, he'll get carries in zone based schemes, etc. But from what I've seen of the past and what I've seen in the many reps, both spring ball and otherwise, has Hayes in a fairly well defined role and the others mixing in to combine for a backup role for the rest of the stuff. Being that Borges likes to do some of the things that are a part of Hayes's role, I think my assumption was pretty fair.
Hockey pet peeve: "when a teammate tips a puck in on you, which is exactly how my first collegiate goal against happened. Thanks, Copper."