2015 WGC-Bridgestone Invitational

Dustin Johnson plays a shot out of a bunker on the second hole during the first round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 6, 2015 in Akron, Ohio. (Photo by Richard Heathcote/Getty Images)

Rickie Fowler lines up a putt on the ninth green during the first round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 6, 2015 in Akron, Ohio. (Photo by Richard Heathcote/Getty Images)

Adam Scott of Australia plays a shot out of a bunker on the second hole during the first round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 6, 2015 in Akron, Ohio. (Photo by Richard Heathcote/Getty Images)

Zach Johnson plays a shot on the third fairway during the first round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 6, 2015 in Akron, Ohio. (Photo by Sam Greenwood/Getty Images)

Jordan Spieth plays his second shot on the third hole during the first round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 6, 2015 in Akron, Ohio. (Photo by Sam Greenwood/Getty Images)

Jim Furyk plays a shot out of a bunker on the seventh hole during the first round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 6, 2015 in Akron, Ohio. (Photo by Sam Greenwood/Getty Images)

Justin Rose of England lines up a putt on the sixth green during the first round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 6, 2015 in Akron, Ohio. (Photo by Sam Greenwood/Getty Images)

Ian Poulter of England hits off the 16th tee during the first round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 6, 2015 in Akron, Ohio. (Photo by Richard Heathcote/Getty Images)

Henrik Stenson of Sweden hits off the eighth tee during the first round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 6, 2015 in Akron, Ohio. (Photo by Sam Greenwood/Getty Images)

Phil Mickelson hits off the eighth tee during the first round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 6, 2015 in Akron, Ohio. (Photo by Sam Greenwood/Getty Images)

Graeme McDowell of Northern Ireland hits off the 12th tee during the first round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 6, 2015 in Akron, Ohio. (Photo by Richard Heathcote/Getty Images)

Jim Furyk plays a shot out of a bunker on the 12th hole during the second round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 7, 2015 in Akron, Ohio. (Photo by Richard Heathcote/Getty Images)

A general view as Graeme McDowell of Northern Ireland hits off the tenth tee during the second round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 7, 2015 in Akron, Ohio. (Photo by Richard Heathcote/Getty Images)

A young fan cheers in the crowd during the second round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 7, 2015 in Akron, Ohio. (Photo by Richard Heathcote/Getty Images)

Jordan Spieth reacts to a shot on the 11th hole during the second round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 7, 2015 in Akron, Ohio. (Photo by Richard Heathcote/Getty Images)

Zach Johnson plays a shot from the 11th rough during the second round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 7, 2015 in Akron, Ohio. (Photo by Richard Heathcote/Getty Images)

Phil Mickelson (L) and caddie Jim Mackay prepare for a shot off the 12th tee during the second round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 7, 2015 in Akron, Ohio. (Photo by Richard Heathcote/Getty Images)

Justin Rose of England walks to the third green during the second round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 7, 2015 in Akron, Ohio. (Photo by Richard Heathcote/Getty Images)

Graeme McDowell of Northern Ireland hits off the third tee during the second round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 7, 2015 in Akron, Ohio. (Photo by Richard Heathcote/Getty Images)

Graeme McDowell of Northern Ireland plays a shot on the second fairway during the second round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 7, 2015 in Akron, Ohio. (Photo by Richard Heathcote/Getty Images)

Jordan Spieth looks on with fans after a shot from the rough on the third hole during the second round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 7, 2015 in Akron, Ohio. (Photo by Richard Heathcote/Getty Images)

Ian Poulter of England hits off the eighth tee during the second round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 7, 2015 in Akron, Ohio. (Photo by Richard Heathcote/Getty Images)

Henrik Stenson of Sweden drops his club after hitting a tee shot on the fourth hole during the second round of the World Golf Championships-Bridgestone Invitational at Firestone Country Club on August 7, 2015 in Akron, Ohio. (Photo by Stan Badz/PGA TOUR)

Justin Rose of England hits a shot to the 16th green during the second round of the World Golf Championships-Bridgestone Invitational at Firestone Country Club on August 7, 2015 in Akron, Ohio. (Photo by Stan Badz/PGA TOUR)

AKRON, OH - AUGUST 08: Phil Mickelson hits off the eighth tee during the third round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 8, 2015 in Akron, Ohio. (Photo by Mike Lawrie/Getty Images)

AKRON, OH - AUGUST 08: Dustin Johnson lines up a putt on the first green during the third round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 8, 2015 in Akron, Ohio. (Photo by Mike Lawrie/Getty Images)

AKRON, OH - AUGUST 08: Henrik Stenson of Sweden lines up a putt on the first green during the third round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 8, 2015 in Akron, Ohio. (Photo by Mike Lawrie/Getty Images)

AKRON, OH - AUGUST 08: Jordan Spieth walks off the second tee during the third round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 8, 2015 in Akron, Ohio. (Photo by Mike Lawrie/Getty Images)

AKRON, OH - AUGUST 08: Jim Furyk hits off the fourth tee as Shane Lowry of Ireland looks on during the third round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 8, 2015 in Akron, Ohio. (Photo by Richard Heathcote/Getty Images)

AKRON, OH - AUGUST 08: Jason Day of Australia plays his second shot on the third hole during the third round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 8, 2015 in Akron, Ohio. (Photo by Richard Heathcote/Getty Images)

AKRON, OH - AUGUST 08: Bubba Watson hits off the fourth tee during the third round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 8, 2015 in Akron, Ohio. (Photo by Richard Heathcote/Getty Images)

AKRON, OH - AUGUST 08: Kevin Na walks to the third green during the third round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 8, 2015 in Akron, Ohio. (Photo by Richard Heathcote/Getty Images)

AKRON, OH - AUGUST 08: Justin Rose hits off the third tee during the third round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 8, 2015 in Akron, Ohio. (Photo by Sam Greenwood/Getty Images)

AKRON, OH - AUGUST 08: Ian Poulter of England plays a shot out of a bunker on the second hole during the third round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 8, 2015 in Akron, Ohio. (Photo by Sam Greenwood/Getty Images)

AKRON, OH - AUGUST 09: Jordan Spieth hits off the third tee during the final round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 9, 2015 in Akron, Ohio. (Photo by Richard Heathcote/Getty Images)

AKRON, OH - AUGUST 09: Rickie Fowler hits off the second tee during the final round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 9, 2015 in Akron, Ohio. (Photo by Sam Greenwood/Getty Images)

AKRON, OH - AUGUST 09: Dustin Johnson plays a shot from a bunker on the third hole during the final round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 9, 2015 in Akron, Ohio. (Photo by Sam Greenwood/Getty Images)

AKRON, OH - AUGUST 09: Shane Lowry of Ireland hits a drive on the fourth hole during the final round of the World Golf Championships-Bridgestone Invitational at Firestone Country Club on August 9, 2015 in Akron, Ohio. (Photo by Stan Badz/PGA TOUR)

AKRON, OH - AUGUST 09: Jim Furyk plays a shot on the third hole during the final round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 9, 2015 in Akron, Ohio. (Photo by Richard Heathcote/Getty Images)

AKRON, OH - AUGUST 09: Henrik Stenson of Sweden lines up a putt on the third green during the final round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 9, 2015 in Akron, Ohio. (Photo by Richard Heathcote/Getty Images)

AKRON, OH - AUGUST 09: Ian Poulter of England lines up a putt on the third green during the final round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 9, 2015 in Akron, Ohio. (Photo by Richard Heathcote/Getty Images)

AKRON, OH - AUGUST 09: Bubba Watson walks to the third green during the final round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 9, 2015 in Akron, Ohio. (Photo by Richard Heathcote/Getty Images)

AKRON, OH - AUGUST 09: Justin Rose of England walks to the second tee during the final round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 9, 2015 in Akron, Ohio. (Photo by Sam Greenwood/Getty Images)

AKRON, OH - AUGUST 09: Graeme McDowell of Northern Ireland hits off the fourth tee during the final round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 9, 2015 in Akron, Ohio. (Photo by Richard Heathcote/Getty Images)

AKRON, OH - AUGUST 09: Shane Lowry of Ireland (R) celebrates with his caddie Dermot Byrne after a birdie putt on the 18th green during the final round of the World Golf Championships - Bridgestone Invitational at Firestone Country Club South Course on August 9, 2015 in Akron, Ohio. (Photo by Mike Lawrie/Getty Images)

AKRON, OH - AUGUST 09: Shane Lowry of Ireland hugs a tree near the 18th green with the Gary Player Cup after winning the World Golf Championships - Bridgestone Invitational during the final round at Firestone Country Club South Course on August 9, 2015 in Akron, Ohio. Lowry finished with a score of -11. (Photo by Richard Heathcote/Getty Images)

AKRON, OH - AUGUST 09: Shane Lowry of Ireland holds the Gary Player Cup after winning the World Golf Championships - Bridgestone Invitational during the final round at Firestone Country Club South Course on August 9, 2015 in Akron, Ohio. Lowry finished with a score of -11. (Photo by Richard Heathcote/Getty Images)