He says he always has that grill whenever he goes up to the podium to receive his awards. Says it's just something he has always done. However, this time the IOC told him he wouldn't receive his gold if he wore them.
As for him being a douche my friends who knew him when he lived in Florida say that he's actually a very sweet family guy and that he just comes off very confident and douchey, because he's super competitive. I wonder if he and MP actually like each other. The media keeps referring to them as 'frenemies'