Fowler and Players Championship victor Webb Simpson were among the leaders as they fought to maintain positions on the Ryder Cup team on the final day of qualifying for eight berths on points.
Woods had made the ideal start by holing from 15 feet for birdie on the first and five feet for another on the second, before nearly chipping in on the fourth after finding trouble off the tee.
And it started early, 7 a.m. local time. The greens would be slightly smoother, the course slightly longer, the approach unchanged - see flag, aim at flag.
It would have been easy to write off Woodland at that point, especially with such a star-studded leaderboard. It was the four-time PGA champion's lowest final round in a major.
Woodland immediately recovered the stroke he lost to par by draining a 19-foot birdie putt on No. 3 to move back into a tie with Koepka, who birdied No. 5 to regain sole possession of the lead. This one missed, and only later did Koepka realize it was for 62.
"My caddie said something walking off", Koepka said. I think the three Jayhawks would enjoy that. It's like, 'Yeah, OK.' I don't know what to say to that.
On cue, those players have ascended into a Sunday showdown that could make the 100th PGA Championship one for the ages.
No one from the afternoon draw completed more than 12 holes. His tee shot sailed into a hazard, forcing Tiger to grind out a par.
"I've worked my way into a chance to win this tournament just to throw it away on a bad decision", said Spieth.
"You're going to have to keep firing".
Bellerive really had no defence.
Despite a late slip-up, Brooks Koepka is still on top of the clubhouse at -12, but Adam Scott is trailing just two strokes behind him after shooting 66 on Saturday. Certainly, the city of St Louis will never forget the excitement he brought. "But being receptive, that's my only hope". He tapped in for par on the final hole to set the PGA Championship scoring record at 264.
Koepka, who missed the Masters with a left wrist injury, is confident entering Sunday's showdown for the Wanamaker Trophy and a top prize of $1.98 million (1.73 million euros).