"I definitely know my role. I've got a lot of stuff to program in my mind right now. There's a lot of stuff in the Andy Reid offense, the same stuff he did with Westbrook and McCoy, and I think I fit his scheme as well as they did," Charles said. "Definitely more studying and definitely more knowing the scheme of the defense, especially when I go out there and play another position like wide receiver. I go in there and try to read the defense. I feel like this year it will be more than I catch out of the backfield."