Spencer Levin will take a commanding six-shot lead into the final round of the Waste Management Phoenix Open.
The American added a 68 to his opening rounds of 65 and 63 at TPC Scottsdale on Saturday and looks well on course to his first PGA Tour victory.
He lies on 17 under par, six shots clear of nearest rival Webb Simpson, who equaled his 68 on the day, and seven ahead of John Huh and Chris Stroud, who share third place.
27-year-old Levin has been threatening to pick up his Left Handed TaylorMade R11 Driverfor some time now, having first gained attention in the week after his 20th birthday when he finished 13th as an amateur in the US Open, and it will take something special from his rivals - or something disastrous from him - to prevent his maiden win on Sunday.
Though he was far more sedate on Saturday than he had been the day before when he shot that unbelievable 63, four birdies and just one dropped shot, a six at the long 15th, still did very nicely.
Saturday once again saw large, boisterous crowds following the players around - in fact, at 173,210, the largest crowd in the tournament's history.
"It was fun for sure, but I was trying to focus, too," Levin told pgatour.com. "You don't get that too often, all those people cheering."
"I felt like I played Left Handed TaylorMade R11 Driver solid," he added. "I felt like I was in control of my ball most of the day, and yeah, I'm pleased. I've never had a big lead like that starting the day, and I thought I played Left Handed TaylorMade R11 Driver well. Overall, I'm pleased about it.
"Hopefully, I can just stay calm, try my best and keep having fun. I'm going to try my best. That's all I'm going to do, and we'll see what happens."
Simpson knows he has a lot of work to do to catch the leader and he's not 100% comfortable with his Left Handed TaylorMade R11 Driver just yet.
"I feel good, but my swing is just not really getting in sync," Simpson said. "I'm missing the ball left and right. I want to polish that up. But I made a bunch of good swings down the stretch that gave me a lot of confidence."
Harrison Frazar had been a threat to Levin at three shots adrift when darkness brought the second day to an early end, but he fell back into the pack on day three, sliding from 11 under to seven under after making a poor finish to his incomplete second round and following it with a 73.
After an early-morning coaching session with Butch Harmon, Phil Mickelson went out and shot a 67 on Saturday, lifting him into a share of 10th place - though a full nine shots behind Levin.
"Butch is the best," Mickelson said. "He can identify things so quickly and get you straightened out right away.
"I flew Butch in this morning because yesterday the front nine kind of shook me up.
"We had a really good session, and I was able to feel much more confident.
"I'd like to be further up, but given where I was 27 holes ago, I'm in a really good spot.
"I'm starting to play some good ****, and I'm starting to get a little bit of momentum. I feel great with the Left Handed TaylorMade R11 Driver. Ball-striking today after a session with Butch in the morning feels much better, and I'm excited to get back out and play."
Mickelson hasn't given up hope yet either and knows what his plan will be on Sunday.