Finau surges to win 3M Open as Piercy unravels

BLAINE, Minn. — After reading he was the betting favorite for the 3M Open, Tony Finau felt the pressure surprisingly mount in his mind as he sought to extend the momentum he has built this summer.

Playing catch-up proved to be the right formula for his third PGA Tour victory.

Finau shot a 4-under 67 to win the 3M Open by three strokes Sunday, erasing a five-stroke deficit with 11 holes left as Scott Piercy tumbled out of the lead down the…