PONTE VEDRA BEACH, Fla. — Mackenzie Hughes arrived at the TPC Sawgrass with no scar tissue and played his first round at The Players Championship with no bogeys.

Pretty simple, eh?

The Canadian rookie shook his head and laughed. Even after going bogey-free in his debut Thursday for a 5-under 67 to share the lead with William McGirt, Hughes saw enough of the Players Stadium Course to realize that surprises lurk around every corner.

“There’s just not really a moment where you can let up,” Hughes said.

No need explaining that to Adam Scott, who won The Players in 2004 and was off to a strong start on a steamy afternoon when he was 6 under and heading to the infamous par-3 17th with its island green.

First, he watched Masters champion Sergio Garcia hit a gap wedge that took one big hop, land just behind the cup and disappear for a hole-in-one. Scott followed by spinning a shot off the bank and into the water for a double bogey.

“I played some good golf out there and unfortunately not on the last two,” Scott said after settling for a 70. “It happens.”

At least he had company.

Dustin Johnson’s first wedge of the way hit the pin, caromed off the green and led to bogey. On a day when nothing seemed to go his way, the world’s No. 1 player opened with a 71. Rory McIlroy went to tap in from 2 feet and missed it, and then had a double bogey on the 10th hole. He shot 73.

Through it all, Hughes was rock solid. Only twice did he have par putts longer than 3 feet, and he made them both. The last piece of stress came on the final hole when trees block his way to the green. To chip out sideways would risk chipping into the water. He found a 4-foot wide window in which he had to keep it under on branch and go over two more. It was a large enough gap and the perfect shot for a 6-iron.

“I was close enough to the trees. It paid off,” said Hughes, who already has won (Sea Island) in his rookie season on the tour.