That is the problem. Dunk and Duffy don't trust him and both realise that they are going to be hugely overworked trying to clear stuff that should be his responsiblity. You just can't visualise Ryan coming through a crowd of players to punch clear or even catch the ball. Opponents are going to ' block ' him out at every opportunity.
Actually when I was told he was coming they stated that was one of the things he is good at.