After a largely disappointing Masters and a missed cut at the US Open, this is the second major in a row in which Woods has been in contention, following his dramatic display at the Open.
He parred every hole on the back nine and his 66 matched his lowest round in a major this year, but he was a little disappointed, not least with a three-putt at the par-five 17th.
Rory McIlroy could not put the same pressure on the leaders however as a single birdie on the fourteenth only enough to leave him on two-under for the tournament with his second round almost completed.
Day, who finished second at the 2016 PGA Championship and tied ninth at last year's edition, is joined in a share of sixth by several others including defending champion Justin Thomas and Tiger Woods (66). 18's playing pretty short as well.
Spieth made four birdies in the last five holes of the front nine to move all the way to 7 under before a wild drive on the par-4 12th derailed his momentum.
"Really confident going into tomorrow with the way I fought the last eight holes, " he said. "They're getting slow, and I didn't hit the putts quite hard enough".
"I made sure on 17 I did". He's the first Utah resident to make the cut in all four majors in one year since Sandy's Mike Weir in 2008. He said there have been no physical issues since the week began with him taking ice baths to combat swelling.
When people mocked Erin Hills as an unworthy U.S. Open test, Koepka answered them two months ago by acing what the USGA conceded was an unfair test at Shinnecock Hills, and he became the sport's first back-to-back national champ since Curtis Strange three decades earlier. He knocked his wedge inside 5 feet and made the birdie putt.
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While trying to avoid the vehicle Lyden swerved into traffic and was hit by the truck which travelling in the same direction. They include a ride in a double-decker open-top bus in NY and posing in front of a large fountain, likely in Central Park .
The seven could have derailed him but to his credit Woodland bounced back with two birdies and will start Sunday tied third just three shots back. "Being in Tiger's group is always exciting".
Finau was among five players who accompanied Furyk to France this summer for a scouting trip at Le Golf Nacional, the host course of the September 28-30 Ryder Cup matches. 'It takes a lot out of you in this heat and it's more mental than physical. "Hearing the crowd, and Tiger's performing great, it was like turning back the hands of the clock". He was helped by a marvellous stroke at the 14th where he pitched in from the back of the green, but the abiding moment was he flew the putting surface once more with a wedge in his hands.
But Woods could turn it only so far. He was in nearly exactly the same position three weeks ago at Carnoustie - tied for sixth, four back - and put himself in the lead on the back nine.
The five-time major victor has also been on every U.S. Presidents Cup team dating to 1994.
And the round was solid, perhaps something to build on. That includes a 4-foot miss after missing a 20-footer for eagle on No. 17.
Woodland still leads the way but there is a glut of talent close behind. His scorecard showed 10 birdies, a triple bogey, three bogeys and four pars. But there's no question what Woods will need to do.
"This golf course is stacked right now and everyone is bunched", Woods said. "The golf course is playing soft, it's gettable, you have to make birdies".
Both his 66s were compiled in the same fashion, shooting 31 for the front nine and 35 blows for the inward half.
He'll play it with a heavy heart, just as he has the entire tournament. "I have played some good golf but inconsistently".