Everything is on the table on Sunday at Bellerive.
Fellow Australians Adam Scott and Jason Day sit two and four shots back of Brooks Koepka respectively.
Woods sank a 17-foot birdie putt on the first hole and dropped his 145-yard approach at the second to four feet with a 9-iron to set up a birdie.
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). After earning his keep the hard way on the minor league circuits overseas, he swaggers about with a chip on his shoulder the size of a beer keg.
Koepka seemed an unlikely candidate to falter, but falter he did. Tiger Woods had completed seven holes in three under par, with playing partner Rory McIlroy carding seven pars.
"They have been unbelievable", said Woods. Glenwild Golf Club's Craig Hocknull shot 72-73 and Davis Park Golf Course's Zach Johnson posted 76-69.
"I mean, I know I can shoot a 7 or 8 under round here. It was like, 'All right'". "So, yeah, special day for me today". "The crowds are insane so we're just trying to plan it out and see what we can see". "Sometimes your haters, I guess, are your biggest motivators".
Woodland and the rest of the field are chasing Koepka, who has won the past two U.S. Opens.
It left a sense of anti-climax, but Woods is still within reach of his 15th major, a situation few would have predicted at the start of a year which has seen the 42-year-old resurrect his career after debilitating injuries. "You're never going to win another golf tournament again".
This year? He ranks 120th in back-nine scoring average on the PGA Tour, and is tied for 10th over the front nine. Koepka didn't waste any time and energy complaining about the USGA.
It's not just the American players who are digging the atmosphere. And now we're going out on a Saturday afternoon in the mix at the PGA, it's great. Yeah, there's a lot of star power, and it should be. "I've made, what I thought might take weeks, kind of a turnaround to be able to trust and hit some really quality shots and work my way up a major championship leaderboard in the span of hours". "You should see the best players in the world come to the top".
His 10-under-par 130 score matched the lowest halfway total in major championship history, and he enjoyed a one-shot halfway lead over Kevin Kisner, and a two-shot cushion over Koepka. Woods actually had sole possession of the lead on the back nine before struggling a bit and finishing a couple strokes out of first.
Exhausted and hungry, an old Tiger survived 29 holes Saturday.
"I did not have my best stuff and hit one green in the last six holes but played them in two under".
It looks like we're all going to have a hell of a lot of fun finding out.