The Pga Championship

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Matt Jones, of Australia, hits on the third hole during the second round of the PGA Championship golf tournament Friday, Aug. 14, 2015, at Whistling Straits in Haven, Wis. (AP Photo/Brynn Anderson)

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Dustin Johnson hits a drive on the 16th hole during the first round of the PGA Championship golf tournament Thursday, Aug. 13, 2015, at Whistling Straits in Haven, Wis. (AP Photo/Jae Hong)

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Rory McIlroy, of Northern Ireland, catches a ball on the range before a practice round for the PGA Championship golf tournament Wednesday, Aug. 12, 2015, at Whistling Straits in Haven, Wis. (AP Photo/Chris Carlson)

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A course worker motions from a mound on the second hole during a practice round for the PGA Championship golf tournament at Whistling Straits Golf Course on Monday, Aug. 10, 2015 in Haven, Wis. (AP Photo/Chris Carlson)

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FILE - In this Friday, Aug. 8, 2014 file photo, Tiger Woods winces after tee shot on the sixth hole during the second round of the PGA Championship golf tournament at Valhalla Golf Club in Louisville, Ky. The last time Tiger Woods was seen at a golf tournament was at the PGA Championship when he missed the cut. He returns this week at the Hero World Challenge in Windermere, Fla. (AP Photo/Jeff Roberson, File)

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Tiger Woods watches his tee shot on the first hole during the second round of the PGA Championship golf tournament at Valhalla Golf Club on Friday, Aug. 8, 2014, in Louisville, Ky. (AP Photo/Jeff Roberson)

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Tiger Woods watches his tee shot on the ninth hole during the first round of the PGA Championship golf tournament at Valhalla Golf Club on Thursday, Aug. 7, 2014, in Louisville, Ky. (AP Photo/John Locher)

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**FILE** Rory McIlroy of Northern Ireland hugs his father Gerry McIlroy after the final round of the PGA Championship golf tournament on the Ocean Course of the Kiawah Island Golf Resort in Kiawah Island, S.C., Sunday, Aug. 12, 2012. (AP Photo/Chuck Burton)