CHARLOTTE, N.C. — Hideki Matsuyama never looks satisfied with his shots or his score, no matter how good they look.

Perhaps it will take winning a major to change that.

Five days after the 25-year-old Japanese star closed with a 61 to win his second World Golf Championship, Matsuyama motored through a dampened Quail Hollow with a 7-under 64 that gave him a share of the lead with Kevin Kisner (67) in the PGA Championship.

They were at 8-under 134, all but ending the hopes of Jordan Spieth to get the career Grand Slam this year.

Heavy rain that suspended play Friday afternoon made Quail Hollow more vulnerable than it has been all week, only Spieth couldn’t take advantage. He made only one birdie, finished with a bogey, and shot a 73 to finish 11 shots out of the lead.

“I kind of accept the fact that I’m essentially out of this tournament pending some form of crazy stuff the next couple of days,” Spieth said.

Kisner faced tougher, faster conditions in the morning and holed a 50-foot eagle putt from short of the green on the par-5 seventh hole. When his round was over, Kisner had a five-shot lead over the players from his side of the draw.

It didn’t look as though anyone would get close.

“These guys going out this afternoon, they break 70, they’ve done a hell of a job,” Rory McIlroy said after a 73 that put him 10 shots back.

A light rain began falling not long after McIlroy’s prediction.

Then, the storms rolled in with heavy rain that drenched the course and forced a rain delay of 1 hour, 43 minutes. And when the second round resumed, it felt like an entirely different golf course.

Jason Day, who played a four-hole stretch in 5 under around the turn and before the storms, began smashing driver without regard that it might run through the fairways and into the rough. He shot 66 and was two shots behind.

There were pitch marks on the putting surfaces. There were splotches of mud of the sides of golf balls. But the biggest difference was the rain took the fear out of putting on the fast, frightening greens and sent scores tumbling.