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Rory McIlroy, of Northern Ireland, celebrates after winning the PGA Championship golf tournament at Valhalla Golf Club on Sunday, Aug. 10, 2014, in Louisville, Ky. (AP Photo/Jeff Roberson) ( PGA Championship Golf )

Rory McIlroy, of Northern Ireland, celebrates with is father, Gerry, after winning the PGA Championship golf tournament at Valhalla Golf Club on Sunday, Aug. 10, 2014, in Louisville, Ky. (AP Photo/John Locher) ( PGA Championship Golf )

A note on the leaderboard reads 'Congratulations Rory See You At Whistling Straits' after his one-stroke victory during the final round of the 96th PGA Championship at Valhalla Golf Club on August 10, 2014 in Louisville, Kentucky. (Photo by Andy Lyons/Getty Images) ( 453461504 )

Rory McIlroy of Northern Ireland celebrates with the Wanamaker trophy after his one-stroke victory during the final round of the 96th PGA Championship at Valhalla Golf Club on August 10, 2014 in Louisville, Kentucky. (Photo by Andrew Redington/Getty Images) ( 453461746 )

Rory McIlroy, of Northern Ireland, holds up the Wanamaker Trophy after winning the PGA Championship golf tournament at Valhalla Golf Club on Sunday, Aug. 10, 2014, in Louisville, Ky. (AP Photo/John Locher) ( PGA Championship Golf )

Phil Mickelson of the United States reacts on the tenth green during the final round of the 96th PGA Championship at Valhalla Golf Club on August 10, 2014 in Louisville, Kentucky. (Photo by Jeff Gross/Getty Images) ( 453458130 )

Rickie Fowler of the United States reacts on the fifth tee during the final round of the 96th PGA Championship at Valhalla Golf Club on August 10, 2014 in Louisville, Kentucky. (Photo by Warren Little/Getty Images) ( 453449570 )

Phil Mickelson of the United States waits on the 18th green alongside his caddie Jim Mackay during the final round of the 96th PGA Championship at Valhalla Golf Club on August 10, 2014 in Louisville, Kentucky. (Photo by Jeff Gross/Getty Images) ( 453462244 )

Rickie Fowler watches his tee shot on the 14th hole during the final round of the PGA Championship golf tournament at Valhalla Golf Club on Sunday, Aug. 10, 2014, in Louisville, Ky. (AP Photo/Jeff Roberson) ( PGA Championship Golf )

Bernd Wiesberger of Austria hits his tee shot on the 12th hole during the final round of the 96th PGA Championship at Valhalla Golf Club on August 10, 2014 in Louisville, Kentucky. (Photo by Andrew Redington/Getty Images) ( 453457526 )

Henrik Stenson of Sweden and Mikko Ilonen of Finland walk up the 14th hole during the final round of the 96th PGA Championship at Valhalla Golf Club on August 10, 2014 in Louisville, Kentucky. (Photo by Warren Little/Getty Images) ( 453459110 )

Henrik Stenson of Sweden hits his tee shot on the 18th hole during the final round of the 96th PGA Championship at Valhalla Golf Club on August 10, 2014 in Louisville, Kentucky. (Photo by Sam Greenwood/Getty Images) ( 453459648 )

Phil Mickelson of the United States walks to the 18th green during the final round of the 96th PGA Championship at Valhalla Golf Club on August 10, 2014 in Louisville, Kentucky. (Photo by Sam Greenwood/Getty Images) ( 453462280 )

Brian Harman of the United States hits his tee shot on the 12th hole during the final round of the 96th PGA Championship at Valhalla Golf Club on August 10, 2014 in Louisville, Kentucky. (Photo by Andrew Redington/Getty Images) ( 453450232 )

Adam Scott of Australia hits his tee shot on the eighth hole during the final round of the 96th PGA Championship at Valhalla Golf Club on August 10, 2014 in Louisville, Kentucky. (Photo by Warren Little/Getty Images) ( 453453034 )

Henrik Stenson of Sweden hits his tee shot on the eighth hole during the final round of the 96th PGA Championship at Valhalla Golf Club on August 10, 2014 in Louisville, Kentucky. (Photo by Sam Greenwood/Getty Images) ( 453453098 )

Ernie Els of South Africa reacts on the 15th green alongside caddie Colin Byrne during the final round of the 96th PGA Championship at Valhalla Golf Club on August 10, 2014 in Louisville, Kentucky. (Photo by Andrew Redington/Getty Images) ( 453454920 )

Jimmy Walker of the United States hits a tee shot on the 15th hole during the final round of the 96th PGA Championship at Valhalla Golf Club on August 10, 2014 in Louisville, Kentucky. (Photo by Andrew Redington/Getty Images) ( 453454958 )

Rickie Fowler of the United States plays his second shot to the seventh hole during the final round of the 96th PGA Championship at Valhalla Golf Club on August 10, 2014 in Louisville, Kentucky. (Photo by David Cannon/Getty Images) ( 453455154 )

Rory McIlroy of Northern Ireland hits his second shot on the fifth hole during the final round of the 96th PGA Championship at Valhalla Golf Club on August 10, 2014 in Louisville, Kentucky. (Photo by David Cannon/Getty Images) ( 453455570 )

Rickie Fowler of the United States hits his tee shot on the tenth hole during the final round of the 96th PGA Championship at Valhalla Golf Club on August 10, 2014 in Louisville, Kentucky. (Photo by Andrew Redington/Getty Images) ( 453455668 )

Rickie Fowler of the United States hits his second shot on the 12th hole during the final round of the 96th PGA Championship at Valhalla Golf Club on August 10, 2014 in Louisville, Kentucky. (Photo by Jeff Gross/Getty Images) ( 453458012 )

Fans watch play on the 14th hole during the final round of the 96th PGA Championship at Valhalla Golf Club on August 10, 2014 in Louisville, Kentucky. (Photo by David Cannon/Getty Images) ( 453458350 )

Rickie Fowler of the United States hits his tee shot on the 15th hole during the final round of the 96th PGA Championship at Valhalla Golf Club on August 10, 2014 in Louisville, Kentucky. (Photo by Warren Little/Getty Images) ( 453458440 )

Phil Mickelson of the United States hits his tee shot on the 15th hole during the final round of the 96th PGA Championship at Valhalla Golf Club on August 10, 2014 in Louisville, Kentucky. (Photo by Warren Little/Getty Images) ( 453458472 )

Rory McIlroy of Northern Ireland lines up a putt on the 14th green during the final round of the 96th PGA Championship at Valhalla Golf Club on August 10, 2014 in Louisville, Kentucky. (Photo by Andy Lyons/Getty Images) ( 453458728 )

Rory McIlroy of Northern Ireland hits a shot from a greenside bunker on the 18th hole during the final round of the 96th PGA Championship at Valhalla Golf Club on August 10, 2014 in Louisville, Kentucky. (Photo by Jeff Gross/Getty Images) ( 453461230 )

Victor Dubuisson, of France, watches his tee on the fifth hole during the final round of the PGA Championship golf tournament at Valhalla Golf Club on Sunday, Aug. 10, 2014, in Louisville, Ky. (AP Photo/David J. Phillip) ( PGA Championship Golf )

Lee Westwood, of England, waves after making a birdie putt on the first hole during the final round of the PGA Championship golf tournament at Valhalla Golf Club on Sunday, Aug. 10, 2014, in Louisville, Ky. (AP Photo/John Locher) ( PGA Championship Golf )