The British Open

British Open Golf Tiger Woods of the United States plays a shot off the 16th tee during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Jon Super)

AP Photo/Jon Super

APTOPIX British Open Golf Phil Mickelson of the United States plays out of the bunker on the second hole during the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Peter Morrison)

AP Photo/Peter Morrison

British Open Golf Dustin Johnson of the United States plays a shot off the third tee as Bubba Watson of the United States looks on during the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Matt Dunham)

AP Photo/Matt Dunham

British Open Golf Jimmy Walker of the United States plays a shot on the 14th hole during the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Jon Super)

AP Photo/Jon Super

British Open Golf Miguel Angel Jimenez of Spain plays a shot off the 15th tee during the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Jon Super)

AP Photo/Jon Super

British Open Golf Rory McIlroy of Northern Ireland plays out of a bunker during the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Peter Morrison)

AP Photo/Peter Morrison

British Open Golf Dustin Johnson of the United States plays a shot off the 11th tee during the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Peter Morrison)

AP Photo/Peter Morrison

British Open Golf Bubba Watson of the United States plays a shot off the 12th tee during the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Peter Morrison)

AP Photo/Peter Morrison

British Open Golf Martin Laird of Scotland hands his club to his caddie Shay Knight after playing a shot off the 17th tee during the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Jon Super)

AP Photo/Jon Super

British Open Golf Luke Donald of England reacts on the 18th hole during the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Jon Super)

AP Photo/Jon Super

British Open Golf Sergio Garcia of Spain plays a shot on the 18th hole during the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Jon Super)

AP Photo/Jon Super

British Open Golf Adam Scott of Australia, left, shakes hands with Matt Kuchar of the United States on the 18th green after their second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Jon Super)

AP Photo/Jon Super

British Open Golf Spectators watch Tiger Woods of the United States and Graeme McDowell of Northern Ireland on the 11th hole from a grandstand during the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Scott Heppell)

AP Photo/Scott Heppell

British Open Golf Tiger Woods of the United States lines up a putt on the 14th green during the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Scott Heppell)

AP Photo/Scott Heppell

British Open Golf Spectators wearing colorful hats watch the play on the 14th hole during the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Scott Heppell)

AP Photo/Scott Heppell

British Open Golf A spectator uses binoculars to watch the play during the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Scott Heppell)

AP Photo/Scott Heppell

British Open Golf Tiger Woods of the United States walks onto the 18th green during the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Scott Heppell)

AP Photo/Scott Heppell

British Open Golf Skier Lindsey Vonn, girlfriend of Tiger Woods of the United States, watches the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Scott Heppell)

AP Photo/Scott Heppell

British Open Golf Rafael Cabrera-Bello of Spain plays a shot off the 10th tee during the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Jon Super)

AP Photo/Jon Super

British Open Golf Miguel Angel Jimenez of Spain looks along the 9th fairway with his caddie Clifford Botha during the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Jon Super)

AP Photo/Jon Super

British Open Golf KJ Choi of Korea holds up his ball after putting on the 9th green during the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Jon Super)

AP Photo/Jon Super

British Open Golf Rory McIlroy of Northern Ireland plays a shot on the third hole during the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Peter Morrison)

AP Photo/Peter Morrison

British Open Golf Rafael Cabrera-Bello of Spain plays a shot off the 11th tee during the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Jon Super)

AP Photo/Jon Super

British Open Golf Zach Johnson of the United States plays a shot off the third tee during the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Matt Dunham)

AP Photo/Matt Dunham

British Open Golf Phil Mickelson of the United States plays a shot off the third tee during the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Matt Dunham)

AP Photo/Matt Dunham

British Open Golf Bubba Watson of the United States plays a shot off the third tee during the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Matt Dunham)

AP Photo/Matt Dunham

British Open Golf Ernie Els of South Africa prepares to play off the third tee during the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Matt Dunham)

AP Photo/Matt Dunham

APTOPIX British Open Golf Rory McIlroy of Northern Ireland pulls his hat down on the third tee box during the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Peter Morrison)

AP Photo/Peter Morrison

British Open Golf Rory McIlroy of Northern Ireland plays out of a bunker onto the third green during the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Peter Morrison)

AP Photo/Peter Morrison

British Open Golf Dustin Johnson of the United States lines up a putt on the second green during the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Matt Dunham)

AP Photo/Matt Dunham

British Open Golf Brandt Snedeker of the United States plays a shot off the third tee during the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Matt Dunham)

AP Photo/Matt Dunham

British Open Golf Dustin Johnson of the United States plays a shot on the first fairway during the second round of the British Open Golf Championship at Muirfield, Scotland, Friday July 19, 2013. (AP Photo/Matt Dunham)

AP Photo/Matt Dunham

British Open Golf Tiger Woods of the United States plays a shot off the 15th tee as his caddie Joe LaCava looks on during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Jon Super)

AP Photo/Jon Super

British Open Golf Tiger Woods of the United States catches a ball from his caddie Joe LaCava on the 17the green during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Jon Super)

AP Photo/Jon Super

British Open Golf Francesco Molinari of Italy plays a shot on the 16th fairway during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Peter Morrison)

AP Photo/Peter Morrison