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SOUTHPORT, ENGLAND - JULY 20: Phil Mickelson of the United States tees off on the 5th hole during the first round of the 146th Open Championship at Royal Birkdale on July 20, 2017 in Southport, England. (Photo by Warren Little/R&A/R&A via Getty Images)

SOUTHPORT, ENGLAND - JULY 20: Phil Mickelson of the United States tees off on the 5th hole during the first round of the 146th Open Championship at Royal Birkdale on July 20, 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