Still, it is the first time since the 2005 Masters that Woods has shot consecutive rounds of 66 or better in a major championship.
Ten and a half hours and 29 holes after he hit his first shot of the day, Woods finds himself again in contention at a major championship, four strokes back of leader Brooks Koepka in a tie for sixth.
Woods, a 14-time major champion in his comeback season from spinal fusion surgery, fired a 66 to share fourth on 202 with second-ranked defending champion Justin Thomas, 2009 British Open victor Stewart Cink, Ireland's Shane Lowry, Australia's Jason Day and South African Charl Schwartzel.
Ben Kern, the only club professional to make the cut, shot a 67 Saturday to move to 3-under for the tournament.
Woods is set to tee off at 2:35 p.m. ET alongside Gary Woodland.
American Brooks Koepka leads the US PGA Championship going into the final day at Bellerive, despite two late bogeys reducing his advantage to two shots.
That put him at 10-under 130, breaking by one the PGA Championship record and tying the 36-hole score for all majors.More news: 3 days later, Kanye still hasn't answered Jimmy Kimmel's question about Trump
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.
A bogey on the 10th was instantly cancelled out by a tap-in birdie on the short 11th, but Woods then three-putted from 100 feet on the next after his approach from the rough just reached the front of the green. "There were good signs that carried over to today, and hopefully tomorrow it gets better and better".
"[On Saturday], I was in there with Dustin, and everybody wanted a picture with Dustin", Koepka said.
Kisner birdied six of the first nine holes but opened his second nine with six pars.
"It seemed like that was the only way I was going to make birdie, hit it to tap-in distance or chip in", McIlroy said.
Matt Wallace was already enjoying his day alongside three-time major victor Jordan Spieth when he made a hole-in-one on the 16th from 232 yards.More news: Australian teacher finds prehistoric shark teeth
Day, who finished second by one shot at the 2016 PGA Championship and tied for ninth past year, knows what has been missing his 2015 triumph. To have Turner essentially go with old syndicated dramas all morning on Thursday and Friday while the year's final major kicks into gear remains a baffling decision.
But then the golfing gods gifted this marathon Saturday out of left field and left us all with a Sunday at colorless and faceless Bellerive that could be the most memorable golf event of the year, and of many years to come.
"I have my dad here to watch". "And I just wish I could have got myself a couple more shots closer to the lead, especially with the way 17 is playing, moving the tee way up like that".
"Obviously things haven't been going well for me this year".
"It was nice to have that in my back pocket, been there in that same situation and came out on top".
"So in eight holes, he had seven birdies", Furyk said. "I just have to make the adjustments better than I did". "To get to seven was lovely".More news: Infowars Tweets Deleted After CNN Cites Examples of Twitter Policy Violations