PGA Tour veteran Stewart Cink claimed his third RBC Heritage title on Sunday, 21 years and two days after his first.
The 47-year-old, who was a tournament-record 16 under after two rounds, ended with a one-under-par 70 to win on 19 under at Harbour Town, South Carolina.
He finished four shots clear of Argentina's Emiliano Grillo and American Harold Varner III.
"It was just a really good, solid week all the way through," said Cink, who sealed his second win of the season.
"It was pretty spectacular the first two days, it was like I could do no wrong. Then the weekend was just a bunch of solid hitting, nothing exciting, but enough."
The 2009 Open champion, who had won at Hilton Head in 2000 and 2004, went into the final round with a five-stroke lead and held his nerve with two birdies and a bogey over his final 18 holes for his eighth PGA Tour victory.
England's Matthew Fitzpatrick shot a three-under 68 to finish in a three-way tie for fourth.