We take a look at three of the runners and riders you should be keeping an eye on at the PGA Championship:
His form is up and down, to say the least, but the American has won on the PGA Tour this season – at the CareerBuilder Challenge in January – and his PGA Championship record is enviable.
After losing a play-off to Keegan Bradley in 2011, Dufner got his hands on the Wanamaker Trophy two years later at Oak Hill. He has enjoyed three top 5s in seven appearances. Tied-8th at Oakmont in the US Open, he has been maddeningly inconsistent in recent months. But if the mood takes Dufner, then he has definitely got the long game to get in the frame.
Two wins, four top 5s, five top 10s and six top 25s in seven appearances. You simply have to back Rory McIlroy at the PGA Championship.
He seems to peak from mid-July and people forget that last season he finished 17th only weeks after suffering an ankle ligament injury that kept him from defending his Open crown.
Inconsistency has been a problem all season for the Northern Irishman but, if he can just string four rounds together, he can dominate this field. Having pulled out of the Olympics, he will be ultra motivated to claim a third PGA title.
Likely to represent the United States at the Ryder Cup, Koepka could travel to Hazeltine in style with a PGA Championship win in his locker.
The 26-year-old looks a Major champion in waiting and, having come through the Challenge Tour before landing a PGA Tour spot, he is used to overcoming adversity.
A long hitter, the Florida native has already made an impact in the short time he’s competed on the Major circuit. A top 5 showing in last year’s PGA, and strong displays in previous Open and US Opens, suggest he can excel in the pressure of a final-round Sunday.