The American duo are two shots clear at the halfway stage.
The 37-year-old American is one shot clear of his rivals.
All you need to know ahead of the 98th US PGA Championship at Baltusrol Golf Club in Springfield, New Jersey.
Tiger Woods has not played a single event in 2016, and was last seen at the Wyndham Championship in August 2015.
Fowler is among the favourites to land the coveted gold medal.
There are two golf events in the Brazil Games - here is a history of the event and its 2016 schedule.
Stenson, McIlroy and Willett lead the European Points list
Swede cards a majestic 8-under 63 to lift the Claret Jug and finish the tournament 20-under par.
The American relinquishes the lead at Royal Troon as Stenson eyes maiden major title.
2013 champion leads by a single shot ahead of Henrik Stenson.
Mickelson finished 63 eight under par.
Royal Troon is set to stage one of the highlights of the British sporting summer.
Golf is returning to the Olympic programme for the first time since 1904.
The 22-year-old star has become the latest big-name player to pull out of the event.
Colin Montgomerie will hit the first ball at Royal Troon.
15 golfers have withdrawn from the 2016 Rio Olympic games so far.
The Australian world number one has voiced his fears about the mosquito-borne virus.
East Lothian course was barred from hosting The Open after May ballot saw continued ban on women members.
The Northern Irish captain did admit he was surprised by the result of the 23 June vote.
Golf lovers came from far and wide to pursue their ambition of playing at Royal Troon.
The 27-year-old golfer was set to represent Ireland at this summer's Games.
Governors of American golf admit delay caused a "distraction" which overshadowed final round.
The threat of a one-stroke penalty didn't faze Johnson as he triumphed in Oakmont.
The 29-year-old Irishman is looking to win the first major of his career in Pennsylvania.
American leads on four-under but many players are yet to begin second round in Pittsburgh.
The world number 624 currently leads the field after a frustrating day for fans in Pittsburgh.
All you need to know ahead of the second gold major of 2016 at Oakmont County Club.
Jordan Spieth and Rory McIlroy will be the star attraction at the event in the absence of Tiger Woods.
Tiger Woods has not played a competitive round on the PGA Tour since August 2015.
Golf is well and truly part of the data revolution spearheading improvement across sport.