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ST ANDREWS, SCOTLAND - JULY 19: Dustin Johnson of the United States putts on the 18th green as his caddie looks on during the third round of the 144th Open Championship at The Old Course on July 19, 2015 in St Andrews, Scotland. (Photo by Warren Little/R&A/R&A via Getty Images)

ST ANDREWS, SCOTLAND - JULY 19: Dustin Johnson of the United States putts on the 18th green as his caddie looks on during the third round of the 144th Open Championship at The Old Course on July 19, 2015 in St Andrews, Scotland. (Photo by Warren Little/R&A/R&A via Getty Images)
Getty Images

R & A Warren Little/R&A