Hunter Mahan stormed clear of a congested leaderboard with five birdies in the last eight holes to claim his sixth PGA Tour victory by two shots at The Barclays.
1 Rory McIlroy (Britain)
2 Adam Scott (Australia)
3 Henrik Stenson (Sweden)
4 Sergio Garcia (Spain)
5 Justin Rose (Britain)
6 Jim Furyk (US)
7 Jason Day (Australia)
8 Matt Kuchar (US)
9 Bubba Watson (US)
10 Phil Mickelson (US)
A stroke off the pace heading into the final round, American Mahan knocked in a five-footer at the par-four 11th and sealed the win at the par-five 17th, where he sank a slick 22-foot putt from above the hole.
He could afford the luxury of a bogey at the last, after pushing his tee shot into a tree line, chipping out and missing the green with his third, as he closed with a six-under-par 65 at Ridgewood Country Club to post a 14-under total of 270.
Stuart Appleby also signed off with a 65 in the opener of the PGA Tour's four-event FedExCup playoffs, finishing joint second at 12-under with fellow Australian Jason Day (68) and American Cameron Tringale (66).
World number one Rory McIlroy, who arrived here on a sizzling three-tournament winning streak that included major triumphs at the British Open and PGA Championship, ended his week with a 70 for a five-under total of 279.
Second-ranked Australian Adam Scott, who had been tied for the second-round lead at Ridgewood, finished at seven under after closing with a 68.