Tony Finau finishes strongly to claim the 3M Open

Tony Finau rolled in four birdies on the back nine, including three in a row to break away from the pack Sunday and win the 3M Open at TPC Twin Cities.

Finau's four-under-par 67 lifted him to a winning score of 17-under, with South Korea's Sungjae Im (68) and Argentina's Emiliano Grillo (71) tied for second three back at 14-under.

Scott Piercy, who held at least a share of the lead after each of the first three rounds and a four-stroke lead entering Sunday, stumbled to a 76. He finished in a three-way tie for fourth.

That left the door wide open for Finau to collect his third PGA Tour victory. He was 1 under through ten holes before making birdie at 11, 14, 15 and 16. He found himself in the lead after he birdied the 14th and Piercy, playing one group behind, made triple bogey at the same hole.

When Finau sank a downhill, right-to-left birdie putt from 31 feet away at 15, he'd gone from behind by three shots to ahead by two in a matter of two holes. The winner nearly found water off the tee at the par-three 17th, but narrowly missed a chip-in birdie and saved par. His tee shot at No. 18 did find the water and he settled for bogey, but by then he was out of reach.

Im played a clean round of three birdies and no bogeys to grab a share of second. Conversely, Grillo had five birdies offset by two bogeys and a triple bogey at the par-four seventh, where he had to take a penalty stroke for a dropin the rough behind the green and still couldn't get out with his fourth shot.

James Hahn tied for fourth at 13 under with Tom Hoge (70) and Piercy. Hahn's six-under 65 featured a hole-out eagle from the fairway at the par-5 12th hole. He later had three straight birdies at 14 and 16.

Piercy, 43, was hunting for his fifth career win on tour