Lee Westwood surged into the lead at the Arnold Palmer Invitational ahead of Bryson DeChambeau, who stole the show with a monstrous 370-yard drive on the sixth.
English 47-year-old Westwood shot a seven-under 65 on Saturday to take a one-shot lead at 11 under heading into the final day, sitting ahead of DeChambeau (68) and previous leader Corey Conners (71), who are tied for second.
Keegan Bradley shot a round-best eight-under 64 with his 59th career bogey-free round to move into equal fourth alongside Jordan Spieth (68) at nine under.
Westwood made his move with five birdies on the front nine on Saturday. He also hit an eagle on the 16th and a birdie on the challenging 18th..
"The first time I played here I felt 'this was good'," said Westwood, who has plenty of experience playing at Bay Hill.
"I like the way it makes you shape the ball into some of the fairways. It suits my game. I'm not the longest through the air anymore so it helps when I can use a lot of the fairway."
DeChambeau, who was the Invitational runner-up in 2018, had the crowds roaring on the 590-yard dog leg par-five sixth hole when he ambitiously succeeded in driving to clear the water in a 370-yard carry.
The 2020 U.S. Open champion shot a 68, including six birdies, but his monster drive was all the talk, having teased on social media that he would attempt it in the lead-up.
"I've never had so many people cheering me on to do something pretty cool," the American said.
"To have that opportunity and execute it was pretty special. Hopefully it's something I can do tomorrow again.
"I was definitely nervous. I caught it pretty solid. I didn't know how else to react."
Overnight leader Conners let slip his dominant position but remains in the hunt after two bogeys and three birdies for the round.
Early leader and 2018 Invitational winner Rory McIlroy slipped to equal seventh after an even-par round.
Doug Ghim drew level with McIlroy after an outstanding seven-under 65, with the duo joined at seven under by Jazz Janewattananond (69) and Richy Werenski (69).
Janewattananond made a hole-in-one at the 14th, while Spieth also produced an ace in the third round – his coming at the second.