Hunter Mahan, right, laughs with caddie John Wood after hitting from the 

Hunter Mahan, right, laughs with caddie John Wood after hitting from the 18th tee of the Pebble Beach Golf Links during the first round of the AT&T Pebble Beach Pro-Am golf tournament, Thursday, Feb. 7, 2013, in Pebble Beach, Calif. (AP Photo/Eric Risberg)
Associated Press
Hunter Mahan, right, laughs with caddie John Wood after hitting from the 18th tee of the Pebble Beach Golf Links during the first round of the AT&T Pebble Beach Pro-Am golf tournament, Thursday, Feb. 7, 2013, in Pebble Beach, Calif. (AP Photo/Eric Risberg)
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