Darren Clarke has won his first major title at the British Open.
Phil Mickelson made an impressive charge on the front side, moving into a share of the lead with an eagle at No. 7. But Clarke came along and put up an eagle of his own, then watched Mickelson fade down the stretch for a 68.
Clarke won with a 5-under 275.
Johnson was within two strokes of the lead when he made a huge blunder, knocking an iron shot out of bounds from the 14th fairway. He wound taking a double-bogey that ended his chances.
Johnson settled for a 72, leaving him tied with Mickelson at 278.