Englishman Ian Poulter and American Mark Hubbard are the joint leaders after the first round of the PGA's RBC Heritage event in Charleston.
Both shot a seven-under-par 64 at Hilton Head to lead by one from a posse of seven players.
Jordan Spieth and Tony Fianu are among those two shots behind.
Cameron Smith and Matt Jones were the best of the Australian contingent, both shooting two-under-par rounds of 69.
They are two ahead of Jason Day and Aaron Badderley - their par round leaving them in joint 85th position.
The top three players in the world are all playing - Rory McIlroy, Jon Rahm and Justin Thomas - but none broke par on a day in which 66 players in the 151-man field shot in the 60s.
Dustin Johnson was poised to make a move until he hit into the water on the par-3 14th and compounding the error with a three-putt triple bogey. He still managed a 68.
Poulter had an early tee time at Hilton Head and took a liking to conditions, going blemish-free and finishing with a spring in his step by claiming four birdies after the turn.
He holed a 30-foot birdie putt and followed with a five-iron to four feet for a birdie that closed out his round.
"I've always loved coming here to play golf," said Poulter.
Hubbard, chasing his first PGA Tour title, was equally sharp in an error-free round highlighted by an eagle-three on the par-five second.
World No.1 McIlroy had a slow start, closing one over on 72.
The Northern Irishman, who has questioned the wisdom of European players who have declined to travel, hit three bogeys along the way.
"I wasn't particularly comfortable out there," he admitted.
Spieth had a dicey start, including a triple-bogey at 12, but ended with a surge of momentum as he birdied seven times on the front nine.