Francesco Molinari delivered a record performance to win the final edition of the Quicken Loans National.
Italian Molinari and Texas-born Mexican Ancer each handled the scorching heat on the TPC Potomac at Avenel Farm to be 13 under and two shots clear of their closest challengers. It is Molinari's first career PGA Tour win.
He finished on 21-under 259, while American Ryan Armour shot 68 to finish a distant second on 13-under.
Molinari finished his first nine holes Sunday at 2 under for the round.
'I had some birdie opportunities on the back nine, didn't make them, made a couple bogeys there too, ' Woods said, in a video released by the PGA Tour.
He won a World Golf Championship in Shanghai in 2010, though the PGA Tour did not recognise the HSBC Champions as an official win until a year later.
Woods tallied six birdies and two bogeys during his round on Sunday.
"What's Francesco's doing in phenomenal". "He's definitely been a model and an idol for me, so it would mean a lot [to win]". So I'm seeing the lines again, I'm rolling the ball on my line, I've got the speed, and I really like the swing of this putter.
"It was nice to make a couple of birdies coming in, granted missed a little kick-in on 14", he said after another solid display since undergoing spinal fusion surgery a year ago. Evidently I'd have had to shoot 24 on the back nine.
In fact, Woods first played Carnoustie in the 1995 Scottish Open as a then amateur and receiving a sponsor's invitation before making his Open Championship a week later just down the road at St. Andrews.
"I guess one word (today) would be frustrating, to make four bogeys, I couldn't afford to do that".
Australian Mark Leishman made three birdies in his closing four holes to sign for a 70 and finish at seven under, in a tie for 13th. I just did 100-percent effort every shot, every putt and still, you know, I like looking at the positive side.
And yet, with a new putter in the bag this week, Woods felt good about the improvement he made on the greens.
"Even my bad putts had the "go in" look - that's something that I haven't had, " he said.
The Italian led by three strokes heading into the turn while Ancer, his playing partner and 54-hole co-leader, could not find a way to pick up a birdie.
It would be his first PGA Tour victory since the 2013 Bridgestone Invitational, and would be a huge step towards reclaiming his title as the world's best golfer.
Woods responded, however, with a dramatic 25-foot birdie putt at the par-3 ninth, giving a double fist pump of satisfaction as the crowd erupted in cheers.
Molinari blasted out of a bunker to three feet at the par-5 second and sank his birdie putt and added a 12-foot birdie at the par-4 sixth to stretch his lead to three shots.