Rory McIlroy of Northern Ireland lines up a putt on the third green during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Peter Morrison)
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Rory McIlroy of Northern Ireland lines up a putt on the third green during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Peter Morrison)
