I haven't followed it closely, but I feel like he never fully returned to form after his 2009 car wreck and the cheating scandle. And continued car wrecks just kept making things worse. Isn't there also a question about whether he was a steroid user, which might have lead to premature damage to his body? Definitely had trouble relating to drugs and alcohol. How must it feel to have come soooo close to being considered the greatest golfer ever, only to have that slip away?