I am in a 4.0 league and we are in first place 4-0. All of my players are computer rated and ligit. We beat the defending champions of league they are 3-1. We are playing this coming thursday and they have added a player this week, he is a 24 year old teaching pro who is self rated at 4.0. I am told he is clearly a 4.5 player. What are the rules around this? what should can I do?