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NORTON, MA - SEPTEMBER 02: Rory McIlroy of Northern Ireland on the practice ground prior to the Deutsche Bank Championship at TPC Boston on September 2, 2015 in Norton, Massachusetts. (Photo by Ross Kinnaird/Getty Images)

NORTON, MA - SEPTEMBER 02:  Rory McIlroy of Northern Ireland on the practice ground prior to the Deutsche Bank Championship at TPC Boston on September 2, 2015 in Norton, Massachusetts.  (Photo by Ross Kinnaird/Getty Images)