Zach Johnson of the United States plays a shot off the 6th tee during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Scott Heppell)

Photo by: Scott Heppell

Zach Johnson of the United States plays a shot off the 6th tee during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Scott Heppell)