At eight under through nine, the red-hot American - seeking a first major title - led by three from Marc Leishman and Charley Hoffman. He's led more than half his rounds here (9 of 17). Spieth was among 10 players who broke 70 - a list that included Rory McIlroy - on a warm, sunny day with a moderate breeze that looked ideal for scoring. He tried a 6-footer from there, but came up just short and ended up with a tap-in bogey.
Instead, Woods faltered early and fell as many as 10 shot behind the leader in the second round.
-Tony Finau shot a 68 a day after dislocating his ankle.
Spieth, ranked No. 4 in the world, has finished inside the Top 11 in all four of his Masters starts: 2014 (T-2nd), 2015 (1st), 2016 (T-2nd), 2017 (T-11th).
It was easy to get swept up in the hype that heralded Woods' first appearance in a major since he missed the cut at the 2015 PGA Championship. The victor before that was Tiger Woods, who shot an opening round of 74 in 2005 before defeating Chris DiMarco in a play-off.
Tiger Woods grabbed the spotlight while Swede Henrik Stenson snatched a share of the early first-round lead on a wild Thursday at the Masters that saw champion Sergio Garcia match the worst-ever score for a single hole at Augusta National.
Garcia plummeted to only one place off the bottom of the leaderboard The 38-year-old attempted virtually the same style of flighted shot on each subsequent occasion, before finally getting one to stay on the green - but his one-putt for a 13 equalled Tom Weiskopf in 1980 on the par-three 12th and Japan's Tommy Nakajima on the par-five 13th in 1978.
At the Masters a year ago, Garcia struggled on the 13th but somehow salvaged a par in what turned out to be one of the key moments in his march towards victory, and he marked it by naming his child after the hole. 14 and 16 to finish with a 1-over-par 73. His back-nine scores were 4-4-2-5-5-13-2-4-4. Tiger Woods attracted most of the attention. At his pre-tournament news conference this week, Woods was asked if it would qualify as "the greatest sporting comeback of all time" if, at the tournament's end, he was wearing his fifth Masters jacket.
Phil Mickelson and Rickie Fowler were among those at 70.
The 2018 Masters Tournament is held 05 April through 08 April 2018.
This time, Sergio Garcia offered no excuses. Format: 72-hole stroke play.
Woods, dressed all in black, was under par for all of one hole. It was the 18th playoff in Masters history.
Tiger Woods smiles as he walks to the first green but was frowning after his ball hit an over-zealous spectator later in his round.
But it was an inspiring performance by Finau that had the golf world buzzing.
Shubhankar seemed to have settled himself in after any jitters he may have had of playing his first Masters as he made three steady pars.
Amazingly, however, the reigning Masters champion was able to see some humour after a nightmare on the 15th hole.
It was the idea of wife Angela who said they should name a child where Sergio wins his first major title. Jordan Spieth caused the most concern. Oldest victor is Jack Nicklaus (1986, 46 years, 2 months, 23 days).
All that said, he'd been playing well to start off the 2018 season.
Low round at Masters is 63 (Nick Price/R3/1986, Greg Norman/R1/1996).
Jordan Spieth is missing fairways and struggling with his putter.