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DORAL, FL - MARCH 08: Dustin Johnson (L) of the United States celebrates with caddie Austin Johnson (R) on the eighteenth hole green after winning the World Golf Championships-Cadillac Championship at Trump National Doral Blue Monster Course on March 8, 2015 in Doral, Florida. (Photo by Mike Ehrmann/Getty Images)

DORAL, FL - MARCH 08:  Dustin Johnson (L) of the United States celebrates with caddie Austin Johnson (R) on the eighteenth hole green after winning the World Golf Championships-Cadillac Championship at Trump National Doral Blue Monster Course on March 8, 2015 in Doral, Florida.  (Photo by Mike Ehrmann/Getty Images)