If you are a runner, you withdraw from an event before a race with shin splints. If your a football or baseball player, you let your coach or trainer know during the game and go from there. If you play 3 rounds of golf and are in dead last and feel shin splints, you finish the tournament on Sunday.

If hes going to withdraw at all he's best off telling the truth in a situation like this. For example, if he simply cant find his game on the course and feels it would be worse for his confidence to play on Sunday. Best option of course is to play through it, you may have to one day in the hunt.

I think he needs to start thinking about sportsmanship. He has demonstrated more than once that he has little.