What I am concerned about with Blue:
1. His fumbling reputation will get NFL defenders licking their lips. He can't outrun everybody all the time. They will peanut punch the hell out of him, and if coughs the ball even once in a league game then they will be merciless with punching him till he proves he can do other wise. So the early tactic is gang up and bunch up on him, but don't take him to the ground. Hold him up and strip and wrench his arms to get him to prove he can actually show ball security.
2. Once they get into head that he is a fumbler, then he will begin to change his style of holding the ball. Then you got a player who is slowing down, and then bring the hits. Career ending type hits. He doesn't have the body of Zeke so pound the crap out of him until he quits running fast or coughs up the ball.
This is going to be on the coaches to try to protect Blue until he can prove he belongs with the big boys in this league and he can overcome his weaknesses.