London: American Hunter Mahan, ice-cool when it mattered the most, held his nerve over the closing stretch to win the biggest title of his career by two shots at the WGC-Bridgestone Invitational.
While world number one Tiger Woods and second-ranked Phil Mickelson returned scores they would prefer to forget, Mahan fired a six-under-par 64 to seal his first victory in an elite World Golf Championships event and his third on the PGA Tour.
"I feel great," Mahan said greenside after booking his place on the US team for the Oct. 1-3 Ryder Cup. "This feels unbelievable."
Three strokes off the pace going into the final round, the 28-year-old Mahan charged into contention with a sizzling front nine of five-under 30 and made two clutch putts to save par over the last four holes to post a 12-under total of 268.
Ryan Palmer, co-leader overnight, carded a 69 at Firestone Country Club to finish second, a stroke ahead of fellow American Bo Van Pelt (67) and South African Retief Goosen (65).
Sean O`Hair, who was level with Palmer at the start of the day, returned a 71 for fifth place at eight under.
Palmer and O`Hair each led outright early on in the final round but Mahan made the most significant move with his red-hot run to the turn to draw level with O`Hair at 11 under.
O`Hair slipped back with a three-putt bogey at the eighth and Mahan rolled in an 11-foot birdie putt at the 13th to establish a two-stroke advantage which he never relinquished.
He coolly sank par putts from 15 and eight feet at the 15th and 17th, although in between he was very fortunate not to drop at least a stroke at the par-five 16th.
Mahan was given a free drop there after his second shot ended up in a flower bed to the right of the green. He chipped 60 feet beyond the hole before two-putting to save par.
"I was nervous," he said of the closing stretch. "I wanted it (victory) so bad and I was playing so good. I just didn`t want to make any bogeys. I didn`t want to give them (his rivals) any momentum out there."