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AUGUSTA, GA - APRIL 12: Jordan Spieth of the United States celebrates with his caddie Michael Greller on the 18th green after his four-stroke victory at the 2015 Masters Tournament at Augusta National Golf Club on April 12, 2015 in Augusta, Georgia. (Photo by Jamie Squire/Getty Images)

AUGUSTA, GA - APRIL 12:  Jordan Spieth of the United States celebrates with his caddie Michael Greller on the 18th green after his four-stroke victory at the 2015 Masters Tournament at Augusta National Golf Club on April 12, 2015 in Augusta, Georgia.  (Photo by Jamie Squire/Getty Images)