Gray has always been an athletic freak. He just fumbled a lot as a freshman, so Weis buried him on the depth chart. He didn't get another shot until his senior year, and the rest is history.
If Hinton had turned a couple 2

nobody's into 1,000+ yard rushers, I'd be weeping at his departure. But Cierre and Jonas were NFL-bound RBs long before Hinton stepped on campus, so I'm not inclined to give him a lot of credit.
Warriner, on the other hand, definitely left his mark on the OL. Kelly really needs to make sure he hires a good coach to replace him.