John Peterson checks his club on the driving range during a practice round for the Masters Tournament Wednesday, April 10, 2013, Augusta National Golf Club in Augusta, Ga. (AP Photo/David Goldman)
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Denmark Thorbjorn Olesen's caddie Daniel Parratt waits on the driving range before a practice round for the Masters Tournament Wednesday, April 10, 2013, at augusta National Golf Club in Augusta, Ga. (AP Photo/David Goldman)
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Thorbjorn Olesen, of Denmark, hits on the driving range before a practice round for the Masters Tournament Wednesday, April 10, 2013, at Augusta National Golf Club in Augusta, Ga. (AP Photo/David Goldman)
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Ryo Ishikawa, of Japan, drops golf balls to hit on the driving range before a practice round for the Masters Tournament Wednesday, April 10, 2013, at Augusta National Golf Club in Augusta, Ga. (AP Photo/David Goldman)
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Gonzalo Fernandez-Castano, of Spain, carries a bag of golf balls onto the practice range before a practice round for the Masters golf tournament Wednesday, April 10, 2013, in Augusta, Ga. (AP Photo/David Goldman)
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Adam Scott, of Australia, gets ready to hit on the driving range before a practice round for the Masters Tournament Wednesday, April 10, 2013, at Augusta National Golf Club in Augusta, Ga. (AP Photo/David Goldman)
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K.J. Choi putts on the practice putting green at 2013 Masters Tournament at Augusta National Golf Club on April 10, 2013, in Augusta, Ga. (SARA CALDWELL/STAFF)
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Brandt Snedeker putts on the practice putting green as his caddie, Scott Vail, watches at the 2013 Masters Tournament at Augusta National Golf Club on April 10, 2013, in Augusta, Ga. (SARA CALDWELL/STAFF)
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Brandt Snedeker's caddie, Scott Vail, stretches on the practice putting green at the 2013 Masters Tournament at Augusta National Golf Club on April 10, 2013, in Augusta, Ga. (SARA CALDWELL/STAFF)
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Brandt Snedeker putts on the practice putting green at the 2013 Masters Tournament at Augusta National Golf Club on April 10, 2013, in Augusta, Ga. (SARA CALDWELL/STAFF)
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Angel Cabrera, of Argentina, chips on the driving range before the third practice round at the Masters Tournament at Augusta National Golf Club on Wednesday, April 10, 2013, in Augusta, Ga. (AP Photo/Charlie Riedel)
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Jason Dufner on the practice range before the Par-3 Contest of the 2013 Masters Tournament at Augusta National Golf Club on April 10, 2013, in Augusta, Ga. (SARA CALDWELL/STAFF)
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Jason Dufner on the practice range before the Par-3 Contest of the 2013 Masters Tournament at Augusta National Golf Club on April 10, 2013, in Augusta, Ga. (SARA CALDWELL/STAFF)
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Rickie Fowler talks to his caddie Joseph Skovron on the practice range before the Par-3 Contest of the 2013 Masters Tournament at Augusta National Golf Club on April 10, 2013, in Augusta, Ga. (SARA CALDWELL/STAFF)