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LAHAINA, HI - JANUARY 07: Zach Johnson plays a shot on the 18th hole as his caddie Damon Green looks on during a practice round prior to the Hyundai Tournament of Champions at Plantation Course at Kapalua Golf Club on January 7, 2015 in Lahaina, Hawaii. (Photo by Andy Lyons/Getty Images)

LAHAINA, HI - JANUARY 07:  Zach Johnson plays a shot on the 18th hole as his caddie Damon Green looks on during a practice round prior to the Hyundai Tournament of Champions at Plantation Course at Kapalua Golf Club on January 7, 2015 in Lahaina, Hawaii.  (Photo by Andy Lyons/Getty Images)