10. American golfers have won all three majors this year (Jordan Spieth: Masters, US Open; Zach Johnson: Open Championship). Spieth is 1.30 to finish above Tiger Woods.
9. The last time a country won all four majors in a year was in 1982, when America boasted three champions (Craig Stadler: Masters; Tom Watson: US Open, Open Championship; Raymond Floyd: PGA). American Rickie Fowler is 23.00 to win.
8. Spieth will become only the third player in history to win three majors in a season if he triumphs at Whistling Straits. He is 7.00 to win the tournament.
7. Tiger Woods (2000) and Ben Hogan (1953) are the only other players to achieve three majors in a year. Fourteen-time major winner Woods last won the PGA in 2007 and is 11.00 to place in the top five.
6. Two-time PGA Championship winner Rory McIlroy is vying to become only the sixth player to win the tournament on three occasions. The Northern Irishman is 12.00 to win.
5. The last Englishman to win the PGA Championship was inaugural winner Jim Barnes, who clinched his second title in 1919. Since then, only Nick Faldo (1992) and David Lynn (2012) have been runners-up at the tournament. Danny Willet is 17.00 to finish as top Briton.
4. Phil Mickelson won his sole PGA Championship in 2005 and over the preceding nine years has twice come in the top seven. The leftie is 41.00 to win.
3. Martin Kaymer won this tournament when it was last held at Whistling Straits in 2010. The German is 51.00 to triumph again on the links course.
2. World no.6 Dustin Johnson has won just one PGA tournament all season. He finished tied 49th at the Open and tied 53rd at the WGC-Bridgstone Invitational and is 4.33 to miss the cut.
1. Justin Rose, meanwhile, has finished inside the top six in four of his last five PGA events. The Englishman is 5.50 to place 1-5.