Dan Marino, Jim Kelly & Terry Bradshaw all had low Wonderlic scores IIRC.
And speaking of a dumpster fire of a start to a career, look no further than Terry Bradshaw. Now before anybody freaks out, I'm not comparing this kid to the HOFer. Just that guys have turned it around. I don't know enough about him but with that kind of talent and some good people/organization around him, I'd say the potential reward far outweighs the risk. Never heard Ben speak about another QB on the team like that. He must see something special in the kid.
Now if he just applies himself. Big "if" though.