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ST ANDREWS, SCOTLAND - JULY 16: Phil Mickelson of the United States and caddie Jim Mackay look on from the 13th tee during the first round of the 144th Open Championship at The Old Course on July 16, 2015 in St Andrews, Scotland. (Photo by Andrew Redington/Getty Images)

ST ANDREWS, SCOTLAND - JULY 16: Phil Mickelson of the United States and caddie Jim Mackay look on from the 13th tee during the first round of the 144th Open Championship at The Old Course on July 16, 2015 in St Andrews, Scotland. (Photo by Andrew Redington/Getty Images)
Getty Images

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