Dustin Johnson

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Dustin Johnson hits off the second tee on Sunday, Feb. 9, 2014, during the final round of the AT&T Pebble Beach Pro-Am golf tournament in Pebble Beach, Calif. (AP Photo/Ben Margot)

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Dustin Johnson follows the ball after hitting off the second tee on Sunday, Feb. 9, 2014, during the final round of the AT&T Pebble Beach Pro-Am golf tournament in Pebble Beach, Calif. (AP Photo/Ben Margot)

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Dustin Johnson hits off the seventh tee on Thursday, Feb. 6, 2014, during the first round of the AT&T Pebble Beach Pro-Am golf tournament on the Spyglass Hill Golf Course in Pebble Beach, Calif. (AP Photo/Ben Margot)

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Dustin Johnson hits off the fourth tee Thursday, Feb. 6, 2014, during the first round of the AT&T Pebble Beach Pro-Am golf tournament on the Spyglass Hill Golf Course in Pebble Beach, Calif. (AP Photo/Ben Margot)

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Dustin Johnson hits off the fourth tee on Thursday, Feb. 6, 2014, during the first round of the AT&T Pebble Beach Pro-Am golf tournament on the Spyglass Hill Golf Course in Pebble Beach, Calif. (AP Photo/Ben Margot)

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Dustin Johnson follows his drive off the ninth tee during the second round of the Tournament of Champions golf tournament, Saturday, Jan. 4, 2014, in Kapalua, Hawaii. (AP Photo/Marco Garcia)