Shane Lowry was convinced his game was on the rise, despite his poor scoring. He finally showed that Thursday in the RBC Heritage, shooting a 6-under 65 to take a one-shot lead.

Trey Mullinax, Daniel Berger, Luke List, Ryan Moore and Ryan Palmer were tied for second.

Top-ranked Dustin Johnson, coming off a second-place tie at Masters last week, rallied with two birdies in his final seven holes for a 68, leaving him three shot back.

Dustin Johnson hits on the second hole during the final round for the Masters golf tournament Sunday, April 14, 2019, in Augusta, Ga. (AP Photo/Chris Carlson)
Dustin Johnson hits on the second hole during the final round for the Masters golf tournament Sunday, April 14, 2019, in Augusta, Ga. (AP Photo/Chris Carlson)

Lowry had not broken 70 in a stroke-play event since a 67 in the third round at the AT&T Pebble Beach Pro Am in early February on his way to missing the cut. The Irishman missed three more cuts in the past five weeks, including going 78-73 to end his Masters after two rounds.

Things changed for Lowry at Harbour Town Golf Links, where he birdied three of his first six holes. He made three more birdies on his back nine.

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Francesco Molinari, of Italy, watches his shot go in the water on the 12th hole during the final round for the Masters golf tournament, Sunday, April 14, 2019, in Augusta, Ga. (AP Photo/David J. Phillip)
Francesco Molinari, of Italy, watches his shot go in the water on the 12th hole during the final round for the Masters golf tournament, Sunday, April 14, 2019, in Augusta, Ga. (AP Photo/David J. Phillip)