Gary Woodland set the 36-hole record - for now, anyway - after a round where his driver wasn't as reliable, he didn't see many putts drop and he didn't hit the ball quite as well as the day before.
Kisner shot 29 on the back nine - his first nine - and was threatening to shoot a tournament-record 62 but bogeyed the final hole and settled for 64.
Lowry was three under par for the first ten holes of his second round when play was suspended by rain yesterday.
Woods, ranked 51st, won his most recent major title at the 2008 US Open and has not won any event since the 2013 WGC Bridgestone Invitational but showed solid form last month by leading on the back nine Sunday at last month's British Open.
Garcia also missed the cut at last year's PGA Championship and the 2017 Masters champion carded rounds of 70, 71 to fall one shot off the mark, despite having been one-under with six holes to play on Friday. "Its soft, it's gettable, and you can't just go out there and make a bunch of pars, you're going to have to make some birdies".
Woods, a 14-time major victor in the eighth month of his comeback from spinal fusion surgery, opened Saturday with a birdie at the par-5 eighth. "Tomorrow is going to be a long day for a lot of us and try and get back at it early". He started the back nine double bogey-bogey to stand 4-over when the storm struck.
"I think this morning was very scorable", said Schwartzel, who won the 2011 Masters. "I've been so in the zone you don't know where you are or where you're at".
But a couple of loose swings led to consecutive bogeys and suddenly it was game on, a four-under-par 66 not exactly what Koepka had in mind a couple of hours earlier at Bellerive. McIlroy returned to complete a bogey-free effort, carding all three birdies on his scorecard on Saturday for a 67 to leave himself plenty of work to do over the weekend at seven shots off the pace.
Schwartzel had 30 feet for birdie at his final hole, which would have given him a 62 and matched Branden Grace's low round in a major.
But it is the first time in 14 tournaments this year that Woods has faced more than 18 holes in one day due to a weather delay.
It was the fourth-easiest hole in the opening round when it played 362 yards, but playing from a forward tee Friday makes it a reachable 298 yards - and a tantalizing risk-reward opportunity. If you're hitting it down in the fairway with the way the greens are designed, you can get the ball to about 15 feet on nearly every hole.
Spieth needs to win the PGA to complete a career Grand Slam. Especially on a course that's playing so far under par.
"A little frustrated at this place in general", Spieth said. He went on to play his next 5 holes in 2 under par, which leaves him at even par for the championship in a tie for 64th.