It looks like the 2017 PGA Championship and 2017 U.S. Open have traded places this year.
Normally, the U.S. Open is one of the season's toughest tournaments (if not the hardest). Sometimes, the winner finishes above par, like when Hale Irwin won with a seven-over at Winged Foot in 1974.
The PGA Championship sees more red numbers, most notably when Jason Day shot 20-under to hold off Jordan Spieth at Whistling Straits in 2015.
This year, the U.S. Open featured seven golfers who finished 10-under or better during the tournament. However, we may not see even one person finish at that mark at the PGA Championship given that (a) the course played very tough on Thursday and (b) the weather is about to take a turn for the worse, per the latest National Weather Service forecast.