Webb Simpson claimed victory in the second event staged since the PGA Tour restarted, at Hilton Head Island in South Carolina.
Simpson shot a 64 in the final round, with five birdies in the final seven holes, to win in a tournament record 22 under-par.
Simpson's fellow American Abraham Ancer shot a 65 as he finished second one stroke behind.
England's Tyrrell Hatton and last week's winner, Daniel Berger (USA), finished two shots behind Simpson in joint-third.
The tournament at the Harbour Town Links was three hours behind schedule because of a storm on the South Carolina coast.