"I think anything under par on this golf course is a pretty good score".
Then came two bogeys on Nos. He struggled with his chipping, then three-putted for a seven. "I felt awful about it", Koepka later told reporters.
Jordan Spieth says he doesn't feel any extra expectations at the PGA or any major, but he admits to feeling the pressure. It was just the bunker play and the greens.
As had been rumoured for the best part of a year, it was confirmed yesterday that the US PGA Championship has moved from August to May and the Players Championship moving from May to March.
Spieth played in the 2017 glamour threesome which included the winners of the Masters, the U.S. Open and the British Open.
He came close to becoming the first back-to-back victor in 2016 since Tiger Woods in 2006 and 2007 but went down by a shot Jimmy Walker at Batusrol Golf Club. 16 and 18 sandwiched around a bogey on the par-3 17th. My putting has been the same and that's kind of added a little bit more pressure on the rest of my game. Charley Hoffman had the lone birdie on the 18th, and the only two birdies on the 17th belonged to Ernie Els and Tommy Fleetwood.
FTSE sell-off gathers strength on North Korea fears
In the eurozone, the Paris CAC 40 lost 0.5 percent compared with the closing level on Wednesday. Frankfurt's DAX 30 was also down, shedding 0.1 per cent at 12,142.62 points.
Spieth shot a one-over 72 in the first round of the PGA Championship on Thursday at Quail Hollow Club.
Earlier, there was hardly a breath of wind when local North Carolinian Grayson Murray struck the first tee shot at 7:20 a.m. local time (1120 GMT). The poor guy stayed on the ground for quite a while, but was alert and smiling when Koepka found him and gave him a signed glove.
"That sounded like plastic", the announcers on PGA.com said when the ball bounced off the marshal's head with a sickening pop.
Ernie Els, playing in his 100th major, slumped to a disastrous 80. "It is like Europe as well, but the courses vary and are completely different, so it is tough coming and learning that".
Els started on the back nine and played the first seven holes in 5 over, including a double bogey on the hard par-4 16th hole.
Casey, who began on the back nine, dropped his approach at the par-4 11th three feet from the cup and sank the birdie putt.