He birdied seven of his first nine holes. A bogey from a bunker at the first was followed by an eagle three at the par-5 second, where his second shot landed two feet from the pin. He nabbed another birdie at the par-3 eighth, but closed with a bogey when he hit his tee shot at the ninth into thick brush on the right.
Woods, who battled back pain in a runner-up finish to Scott at The Barclays last week, carded a three-under-par 68 that included four birdies and a bogey.
He said his back was "all good" especially after an extra day off because of the tournament's Friday start. The event, the second of four in the US PGA Tour's season-ending playoffs, will end on Monday - the US Labor Day holiday.
"It helped having that extra day off," Woods said.
"It made a difference. I didn't hit the ball as well as I'd like to, but I scored all right," he said. "I didn't give myself a lot of looks."
Things were even more of a struggle for the third man in the group, as Scott battled to a two-over 73. The Aussie went two-over with bogeys at the 10th and 14th, picked up his only birdie at the par-3 16th, then gave the shot back with a bogey at the par-4 sixth.
Jason Day was the best-placed Australian after shooting a four-under 67 to be tied with Brian Gay, Henrik Stenson, Graham DeLaet, Jordan Spieth, Boo Weekley, Robert Garrigus, KJ Choi, John Merrick, Charl Schwartzel and Brendan Steele. Defending champion Rory McIlroy, trying to turn around a disappointing season carded a one-under 70 that he called "sloppy".
Steve Alker has made a poor start in his search to become the third Kiwi golfer on next year's PGA Tour, missing the cut at the Hotel Fitness Championship in Indiana.
The tournament is the first of four in the Web.Com Tour finals series, with the top 25 players following next month's season-ending Tour Championship earning PGA Tour cards.
Alker had missed the direct qualification attained by compatriots Danny Lee and Tim Wilkinson, after finishing one spot outside the top 25 in the Web.com Tour regular season, leaving him with a battle.
That battle got off to a bad start when the 42-year-old opened the tournament with a four-over par 76 and, while he improved with a five-under par 67 in yesterday's second round, he missed the cut by two strokes.
- AAP, APNZ