Woods is seeking a fifth Masters title and his first major in 11 years.
Woods entered the final round two strokes back of the leader, Francesco Molinari, but Woods ended up taking the lead on the back nine.
He almost holed a 4-iron on the par-5 eighth Saturday on his way to a record-tying 30 on the front nine. It was two years ago at the Masters when Woods said he needed a nerve block just to walk to the Champions Dinner.
Sporting a red mock turtleneck in a nod to his last win at Augusta in 2005, and chewing gum throughout, Woods maintained his cushion to edge world No.2 Dustin Johnson, three-time major champion Brooks Koepka and another American Xander Schauffele.
With the potential of severe weather in the forecast Sunday, Masters officials have adjusted the tee times for the final round.
Tony Finau is no stranger to making a charge at Augusta National, fortunately for him the one he made at the Masters on Saturday left him with a better chance of slipping into a Green Jacket than an ankle brace. He lost his health to four back surgeries that left him unable to get out of bed, much less swing a club, and he went two years without even playing a major.
Woods and Molinari, who were paired together in the final round of last year's British Open won by the Italian, will once again be in the last group. Spieth and Jonas Blixt finished three shots off the pace in second as Watson completed a 69 to secure his second victory at Augusta in three years. "That's where my advantage is, anyway, but in emphasis here at Augusta National".
But he missed a 5-footer for par at the fifth; three-putted the eighth to bogey a par-5; had it to 5 feet after an excellent approach at the par-3 12th and failed to convert. But he showed the rest of the season that he was back to his old self, contending at both the Open Championship and PGA Championship before winning the Tour Championship.
"I know I can play this golf course, just this week I have not played it well enough". The tournament's leaders, meanwhile, will tee off at 9:20 a.m. Playing conservatively to avoid the water on the par-5, Molinari found himself with what should have been a simple third shot onto the green.
"When I was on the Ryder Cup team and I surrounded myself with the other 11 guys and our captains, being in that locker room, it gave me an extra sense of confidence".
I liked his post-round interview, where he said that he was just going to do what he can do and was calm about everything.
"Look, tomorrow is a very important day because there's no doubt someone in the top 15, or a few of them, are going to play very well", Scott said.