Phil Mickelson of the United States prepares to play off the 8th tee during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Peter Morrison)

Photo by: Peter Morrison

Phil Mickelson of the United States prepares to play off the 8th tee during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Peter Morrison)