Colin L
Tour Winner
I understand how that you can be deemed to have caused the movement if the ball moves when you set the club down behind it, but if the ball only starts to move after the stroke has started (and therefore the club isn't near the ball) is it still the case that it's deemed to be caused by the player?
Yes. 18-2b is quite clear. If the ball moves after it has been addressed (other than from a stroke), you are penalised no matter what you do with your club. You could address the ball, remove your club and walk away from the ball and it would make no difference.