Dustin Johnson opened the PGA Championship with a 6-under 66, showing the form that made him a threat at each major this year heading into the weekend.
Photos from the 2015 PGA Championship with Tiger Woods, Jordan Spieth and Rory McIlroy at Whistling Straits.
Jordan Spieth, shown at the 2015 PGA Championship
Tiger Woods, on the other hand, shot a 3-over 75, playing like a golfer who has missed the cut at the past two majors. He'll look to turn that around and earn a spot in weekend play Friday during Round 2.