Even with back-to-back bogeys on the back nine, Koepka had a 4-under 66 for a two-shot lead over Adam Scott, the 2013 Masters champion who has been struggling through his worst season in almost two decades.
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.
England's Wallace produced one of the most memorable moments of the tournament by claiming a "mindblowing" hole in one on the par-three 16th.
That left Woods five strokes off the pace of United States compatriot Koepka, who birdied five of his first nine holes to make the turn on 13-under par, three shots ahead of Americans Rickie Fowler and Gary Woodland with Australian Adam Scott, the 2013 Masters champion, and American Kevin Kisner another stroke adrift.
The victor of the 2018 PGA Championship will take home nearly $2 million. Any player who made the cut but doesn't submit a 72-hole score will also get $3,100.
Look up: Perseid meteor shower peaks this weekend
Friday and Saturday night, where visitors can look through the telescope to view Jupiter, Saturn, Mars, and potentially Venus. No special equipment is needed, but if you want the best view, it helps to be as far from artificial light as possible.
Tiger Woods birdied three of his first seven holes to get to 3 under par before play was suspended. He won in the penultimate group at the U.S. Open each of the last two years. He was six shots back of the lead heading into the third round.
US Open champion Brooks Koepka fired a blistering 63, equalling the PGA Championship record for lowest round, to leapfrog into outright third at eight under. "And that might mean shooting 5 under again to hang around, but I would love to be in the mix coming down the stretch and have the chance to hole some putts to win".
'I actually played well on the back nine in both rounds, ' insisted Woods, with good reason. "I've got to make adjustments better than I did [Saturday]". "I just wish I could have gotten myself a couple more shots closer to the lead".
"You always feel like you've got something to prove, whether it be to yourself or somebody else", said Koepka, who will take a two-stroke lead into the final round following a third-round 66.
"Obviously things haven't been going well for me this year".
Tiger Woods highlights from Rd. 2 of the 2018 PGA Championship
Those birdies after his big blunder stood out to Finau, one of only 11 players to make the cut in all four majors this year. It is only the second time in major-championship history that two scores of 63 or better have been shot in the same round.
Global team gives medication to sick killer whale at sea
They hunt in these groups, and animals that become isolated can suffer a potentially life-threatening food shortage, experts warn. In addition, since J35 has just given birth, she "may have extra lipid stores built up" that were preparing her body for nursing.
Chelsea Send Batshuayi, Zouma Out On Loan
The Belgium worldwide , who impressed big time at Dortmund, will now hope to play a regular first-team football in Spain . The Blues have confirmed that Belgian striker Michy Batshuayi will spend the upcoming season on loan at Valencia .
EPL: Manchester United vs Leicester City
However, a move did not materialise and Mourinho must now work with the same central defensive setup as he did last season. Had they not got to the final of the Champions League last season I actually think they could have finished second.