Even the world's best golfer can have a bad day on the links. Rory McIlroy shot a 9-over par 80 today in the first round of his home event, the Irish Open.

His 80 is the worst round since 2011 and now McIlroy is in danger of not making the cut.

The Royal County Down Golf Club in Northern Ireland is in McIlroy's back yard and as the world's #1 ranked golfer, he is a huge draw this weekend.