In the long run, everyone is responsible for their own actions – which is part of your moral dilemma – your responsibility.
IMHO leave him alone and don’t say or do anything. He’s a player, he’s responsible, and friendship doesn’t really enter into business.
He didn’t play because he’s your friend – he played because he wanted to…
Congratulate him on how well he’s doing – obviously he doesn’t know about stats.
ntaus