Jason Dufner

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Jason Dufner, right, is congratulated by Rickie Fowler after he made a putt on the 18th green during the final round of the Memorial golf tournament, Sunday, June 4, 2017, in Dublin, Ohio. Dufner won the tournament. (AP Photo/Darron Cummings)

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Jack Nicklaus, left, congratulates Jason Dufner after Dufner's final round of the Memorial golf tournament, Sunday, June 4, 2017, in Dublin, Ohio. Dufner won the tournament. (AP Photo/Darron Cummings)

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Jason Dufner, right, is congratulated by Rickie Fowler after he made a putt on the 18th green during the final round of the Memorial golf tournament, Sunday, June 4, 2017, in Dublin, Ohio. Dufner won the tournament. (AP Photo/Darron Cummings)

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Jason Dufner reacts after making a putt on the 18th green during the final round of the Memorial golf tournament, Sunday, June 4, 2017, in Dublin, Ohio. Dufner won the tournament. (AP Photo/Darron Cummings)

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Jason Dufner reacts after making a putt on the 18th green during the final round of the Memorial golf tournament, Sunday, June 4, 2017, in Dublin, Ohio. Dufner won the tournament. (AP Photo/Darron Cummings)

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Jason Dufner reacts after making a putt on the 18th green during the final round of the Memorial golf tournament, Sunday, June 4, 2017, in Dublin, Ohio. Dufner won the tournament. (AP Photo/Darron Cummings)

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Jason Dufner walks on the No. 8 green during the third round of the RBC Heritage golf tournament Saturday, April 15, 2017, at Harbour Town Golf Links on Hilton Head Island, S.C. (Jay Karr/The Island Packet via AP)/The Island Packet via AP)

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The flag on the 18th free blows in the wind as Jason Dufner waits to putt during the first round for the Masters golf tournament Thursday, April 6, 2017, in Augusta, Ga. (AP Photo/David Goldman)

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Jason Dufner watches his putt on the fourth hole during the first round of the CareerBuilder Challenge at the La Quinta Country Club, Thursday, Jan. 19, 2017 in La Quinta, Calif. (AP Photo/Chris Carlson)

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Jason Dufner and his wife Amanda are seen at the 140th Kentucky Derby Saturday, May 3, 2014 in Louisville Ky. (Photo by Joe Imel/Invision/AP)

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Jason Dufner reacts after missing a putt on the third playoff on the 18th hole during the final round of the PGA Colonial golf tournament in Fort Worth, Texas, Sunday, May 25, 2014. Adam Scott went on to win. (AP Photo/LM Otero)

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Jason Dufner reacts after missing a putt on the 17th hole during the final round of the PGA Colonial golf tournament in Fort Worth, Texas, Sunday, May 25, 2014. (AP Photo/LM Otero)

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Jason Dufner watches his tee shot on the third hole during the final round of the PGA Colonial golf tournament in Fort Worth, Texas, Sunday, May 25, 2014. (AP Photo/LM Otero)