Tag: RBC Heritage
Johnson took a one-shot advantage into the final round, before making four bogeys and two double-bogeys to drop to a tie for 28th.
World No 1 Dustin Johnson stumbled badly on the back nine.
Dustin Johnson shot a three-under 68 in trying conditions to end on 10-under 203.
Meanwhile, world number one Dustin Johnson and Argentine Emiliano Grillo had finished their rounds and were tied for second.
Lowry, the winner of the January Abu Dhabi HSBC Championship, carded a bogey-free six-under-par 65 at the Harbour Town course for a one-shot lead.
Satoshi Kodaira beat Kim Si-woo to win the RBC Heritage.