Mickelson, 55, was among three players 50 or older who broke par in the opening round, joining 53-year-old Justin Leonard (70) and 52-year-old Lee Westwood (69).

Phil Mickelson shot a 1-under 70 in the first round of the 153rd British Open at Royal Portrush. The 2013 Open Champion holed out a bunker shot for par on the third hole.