American Stewart Cink held his nerve to win his first PGA Tour title in almost four years with a one-shot victory at the Travelers Championship on Sunday.

Two ahead overnight, Cink surrendered the outright lead after seven holes at the rain-softened TPC River Highlands but birdied three of the last 10 for a closing three under par 67.

Cink, who had not won since the 2004 WGC-NEC Invitational, stayed ahead of the chasing pack with birdies on 13 and 15 before posting an 18-under total of 262.

Defending champion Hunter Mahan birdied the last two holes for a 65 and a tie for second place with fellow American Tommy Armour III, also after a 65.

Compatriot Heath Slocum had been tied for second with three holes remaining but bogeyed the par-three 16th on his way to a 67 and fourth place at 16 under.

Cink, who won his maiden PGA Tour title at River Highlands in 1997 before ending that year as the rookie of the year, made a stumbling start in overcast conditions with a bogey at the par-four fourth.

However, he picked up shots at the sixth and ninth to reach the turn in one-under 34, a stroke in front of the field.

The 35-year-old Alabama native also birdied the par-five 13th to remain one ahead before play was briefly suspended due to the threat of lightning.

After the resumption, Cink got to 18 under with another birdie at the par-four 15th, where he struck a wedge approach to three feet, and parred the last three holes to seal victory.

Fijian Vijay Singh closed with a 68 to secure fifth place at 14 under, one ahead of Americans Michael Allen (64), Kenny Perry (69), Bubba Watson (66) and rookie Brad Adamonis (67).

Speaking after his victory, Cink said: "I can't believe it was that long since the last one.

"I feel like I've played well enough along the way to have won a couple.

"I knew it wasn't going to be easy. I would have loved to have gone out there and shoot 62 and just slam the door on everybody. But I was prepared for that not happening.

"I think I got myself ready, got myself intense to the point where I could block out most distractions, and I played mostly mistake-free today."