Rickie Fowler

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Rickie Fowler signs autographs on the 18th hole during a practice round for 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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Rickie Fowler watches his shot on the second tee during the Quicken Loans National golf tournament, Sunday, July 2, 2017, in Potomac, Md. (AP Photo/Alex Brandon) ** FILE **

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Rickie Fowler putts on the 18th hole during the fourth round of the U.S. Open golf tournament Sunday, June 18, 2017, at Erin Hills in Erin, Wis. (AP Photo/David J. Phillip)

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Rickie Fowler hits a drive during the fourth round of the U.S. Open golf tournament Sunday, June 18, 2017, at Erin Hills in Erin, Wis. (AP Photo/Charlie Riedel)

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Rickie Fowler walks to the ninth hole during the fourth round of the U.S. Open golf tournament Sunday, June 18, 2017, at Erin Hills in Erin, Wis. (AP Photo/David J. Phillip)

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Rickie Fowler on the 18th hole during the fourth round of the U.S. Open golf tournament Sunday, June 18, 2017, at Erin Hills in Erin, Wis. (AP Photo/David J. Phillip)

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Rickie Fowler reacts to a missed putt on the sixth hole during the fourth round of the U.S. Open golf tournament Sunday, June 18, 2017, at Erin Hills in Erin, Wis. (AP Photo/Chris Carlson)

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Rickie Fowler hits from the second tee during the fourth round of the U.S. Open golf tournament Sunday, June 18, 2017, at Erin Hills in Erin, Wis. (AP Photo/Chris Carlson)

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Rickie Fowler hits a shot from the ninth tee during the third round of the U.S. Open golf tournament Saturday, June 17, 2017, at Erin Hills in Erin, Wis. (AP Photo/David J. Phillip)

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Rickie Fowler hits a drive on the 17th hole during the third round of the U.S. Open golf tournament Saturday, June 17, 2017, at Erin Hills in Erin, Wis. (AP Photo/Chris Carlson)

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Rickie Fowler walks off the 18th tee during the second round of the U.S. Open golf tournament Friday, June 16, 2017, at Erin Hills in Erin, Wis. (AP Photo/Charlie Riedel)

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Rickie Fowler hits a drive on the 10th hole during the second round of the U.S. Open golf tournament Friday, June 16, 2017, at Erin Hills in Erin, Wis. (AP Photo/David J. Phillip)

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Rickie Fowler hits a drive on the seventh hole during the second round of the U.S. Open golf tournament Friday, June 16, 2017, at Erin Hills in Erin, Wis. (AP Photo/Chris Carlson)

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Rickie Fowler hits on the 11th hole during the first round of the U.S. Open golf tournament Thursday, June 15, 2017, at Erin Hills in Erin, Wis. (AP Photo/David J. Phillip)

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Rickie Fowler acknowledges the crowd after his first round of the U.S. Open golf tournament Thursday, June 15, 2017, at Erin Hills in Erin, Wis. (AP Photo/David J. Phillip)

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Rickie Fowler hits from the 13th tee during the first round of the U.S. Open golf tournament Thursday, June 15, 2017, at Erin Hills in Erin, Wis. (AP Photo/David J. Phillip)

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Rickie Fowler hits on the 12th hole during the first round of the U.S. Open golf tournament Thursday, June 15, 2017, at Erin Hills in Erin, Wis. (AP Photo/David J. Phillip)

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Rickie Fowler reacts after his birdie on the12th hole during the first round of the U.S. Open golf tournament Thursday, June 15, 2017, at Erin Hills in Erin, Wis. (AP Photo/David J. Phillip)

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Rickie Fowler after putting on the 10th hole during the first round of the U.S. Open golf tournament Thursday, June 15, 2017, at Erin Hills in Erin, Wis. (AP Photo/Chris Carlson)

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Rickie Fowler walks to the clubhouse after a practice round for the U.S. Open golf tournament Monday, June 12, 2017, at Erin Hills in Erin, Wis. (AP Photo/Morry Gash)