Northern Ireland

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Rory McIlroy of Northern Ireland, hits from the bunker on the ninth hole during a practice round at the PGA Championship golf tournament at the Quail Hollow Club Wednesday, Aug. 9, 2017, in Charlotte, N.C. (AP Photo/Chris Carlson)

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Rory McIlroy of Northern Ireland, signs autographs after a practice round at the PGA Championship golf tournament at the Quail Hollow Club Wednesday, Aug. 9, 2017, in Charlotte, N.C. (AP Photo/Chris Carlson)

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Rory McIlroy of Northern Ireland, right, and Justin Thomas share a laugh ninth hole during a practice round at the PGA Championship golf tournament at the Quail Hollow Club Wednesday, Aug. 9, 2017, in Charlotte, N.C. (AP Photo/Chris Carlson)

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Rory McIlroy, of Northern Ireland, arrives for a news conference at the PGA Championship golf tournament at the Quail Hollow Club Tuesday, Aug. 8, 2017, in Charlotte, N.C. (AP Photo/Chris Carlson)

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Rory McIlroy, of Northern Ireland, speaks during a news conference at the PGA Championship golf tournament at the Quail Hollow Club Tuesday, Aug. 8, 2017, in Charlotte, N.C. (AP Photo/Chris Carlson)

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Rory McIlroy of Northern Ireland, smiles after a practice round at the PGA Championship golf tournament at the Quail Hollow Club Tuesday, Aug. 8, 2017, in Charlotte, N.C. (AP Photo/Chris Carlson)

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Rory McIlroy of Northern Ireland, sign autographs after a practice round at the PGA Championship golf tournament at the Quail Hollow Club Tuesday, Aug. 8, 2017, in Charlotte, N.C. (AP Photo/Chris Carlson)

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Rory McIlroy, of Northern Ireland, speaks during a news conference at the PGA Championship golf tournament at the Quail Hollow Club Tuesday, Aug. 8, 2017, in Charlotte, N.C. (AP Photo/Chris Carlson)

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Jordan Spieth, right, and Rory McIlroy, from Northern Ireland, talk before teeing off on the 14th hole during the first round of the Bridgestone Invitational golf tournament at Firestone Country Club, Thursday, Aug. 3, 2017, in Akron, Ohio. (AP Photo/Tony Dejak)

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Rory McIlroy of Northern Ireland, reacts to his putt on the second green, during the final round of The Players Championship golf tournament Sunday, May 14, 2017, in Ponte Vedra Beach, Fla. (AP Photo/Chris O'Meara)

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Rory McIlroy, of Northern Ireland, gestures after missing a birdie putt on the seventh green during the second round of The Players Championship golf tournament Friday, May 12, 2017, in Ponte Vedra Beach, Fla. (AP Photo/Chris O'Meara)

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Rory McIlroy, of Northern Ireland, reacts to his shot from the ninth tee during the first round of The Players Championship golf tournament Thursday, May 11, 2017 in Ponte Vedra Beach, Fla. (AP Photo/Lynne Sladky)

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Rory McIlroy, of Northern Ireland, walks away after he missed a shot on the 11th green during the first round of The Players Championship golf tournament Thursday, May 11, 2017, in Ponte Vedra Beach, Fla. (AP Photo/Chris O'Meara)

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Rory McIlroy, of Northern Ireland, hits from a sand trap on the 11th hole, during a practice round for The Players Championship golf tournament Wednesday, May 10, 2017, in Ponte Vedra Beach, Fla. (AP Photo/Chris O'Meara)

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Rory McIlroy of Northern Ireland, looks back on the seventh green during the third round of the Masters golf tournament Saturday, April 8, 2017, in Augusta, Ga. (AP Photo/Matt Slocum)

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Rory McIlroy of Northern Ireland, waves after his birdie on the second hole during the third round of the Masters golf tournament Saturday, April 8, 2017, in Augusta, Ga. (AP Photo/David J. Phillip)

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Rory McIlroy of Northern Ireland, hits to the seventh hole during the third round of the Masters golf tournament Saturday, April 8, 2017, in Augusta, Ga. (AP Photo/Matt Slocum)

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Rory McIlroy of Northern Ireland, watches his chip shot on the eighth hole during the third round of the Masters golf tournament Saturday, April 8, 2017, in Augusta, Ga. (AP Photo/Chris Carlson)

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Rory McIlroy of Northern Ireland, drops his putter on the 13th hole during the third round of the Masters golf tournament Saturday, April 8, 2017, in Augusta, Ga. (AP Photo/Matt Slocum)

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Rory McIlroy of Northern Ireland, walks off the 18th hole during the second round of the Masters golf tournament Friday, April 7, 2017, in Augusta, Ga. (AP Photo/David J. Phillip)