'Look out for MarQueis Gray. The former college quarterback has made a full-on transition to tight end, and a successful one at that. The Bills have really been impressed with Gray since he stepped foot into One Bills Drive in the middle of the 2014 season. He quickly rose up the depth chart last season, and in a short amount of time, to actually get reps on offense — and he even made an impact on the passing game. Gray has an impressive amount of athleticism to go along with a big frame (6-foot-4, 242-pounds), and is developing as a blocker. Although still technically on the bubble, he has a fantastic shot to make the 53-man roster outright.'