Several months ago Obama appeared on Leno, and talked about how bad a bowler he was at first (there was some film of him during the campaign where he was horrible, couldn't find the lane), and now had improved to at least a level that would be competitive at the Special Olympics level. Here's one link:
http://abcnews.go.com/Politics/Story?id=7129997&page=1
Many others available, just google it....