Cameron Smith is in a six-way tussle for the lead after the opening round of the PGA Tour's Memorial tournament in Dublin, Ohio.
The Australian shot a five-under 67 to sit alongside Luke List, Cameron Young and K.H.Lee among the morning starters before being joined by Mackenzie Hughes and Davis Riley.
Smith, the winner of March's Players Championship called the round "a little bit of a grind."
"Had to make a few good pars on that last nine for me, the front nine," the world No.3 said.
"It was just good to kind of hang in there, make a few birdies, see a few putts going in. I think this is about as easy as this place is going to get today.
"I think it's going to be a lot of stressful golf and a lot of grinding over the weekend.
"Nice to kind of take the box there early in the week."
Among those joining him are Young, who is making his first start since challenging at the PGA Championship.
Young, who finished with two birdies over his last three holes for his 67, was competing in the Korn Ferry Tour a year ago. He has gone from No.170 in the world to No.30, with five top-three finishes in his rookie season where he was three times a runner-up.
The most recent was at Southern Hills, when Young tied for the lead heading to the 14th tee in the final round of the PGA. His chances ended with a double bogey on the 16th.
He was right back at it at the Memorial, making a 15-foot eagle on the par-5 15th on his way to a 31 on his opening nine holes, overcoming a few bogeys on the front nine and capping off another solid day with a 30-foot birdie putt.
"I think we knew what was possible, but I think I've also gotten a lot better throughout this season," Young said.
"And having done well makes it a lot easier. If I was really fighting to keep my card for next year, I think it gets a lot harder.
"To have been around the lead and then finish high a few times, I think just that comfort level has gone up and I've been able to keep going."
List, who picked up his first win at Torrey Pines in January, had only one bogey in his 67.
Will Zalatoris, who lost in the PGA Championship playoff to Justin Thomas, had eight birdies in his round of 68 and wasn't sure what to make of his round.
"I did not think 68 with eight birdies was in the cards when I came out Monday, Tuesday," Zalatoris said.
Defending champion Patrick Cantlay didn't find nearly as many birdies as everyone else from the morning wave, just two birdies against two bogeys for an even-par 72.
Collin Morikawa, who lost to Cantlay in the playoff at the Memorial last year, had two birdies for a 71.
Adam Scott and Lucas Herbert shot 70s to be tied 21st while Jason Day is a shot back with Cam Davis.