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SOUTHPORT, ENGLAND - JULY 23: Jordan Spieth of the United States and his caddie Michael Greller walk onto the first tee during the final round of the 146th Open Championship at Royal Birkdale on July 23, 2017 in Southport, England. (Photo by Warren Little/R&A/R&A via Getty Images)

SOUTHPORT, ENGLAND - JULY 23: Jordan Spieth of the United States and his caddie Michael Greller walk onto the first tee during the final round of the 146th Open Championship at Royal Birkdale on July 23, 2017 in Southport, England. (Photo by Warren Little/R&A/R&A via Getty Images)
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R & A Warren Little/R&A