Rickie Fowler birdied the last three holes to take the lead in the Waste Management Phoenix Open, overcoming a sluggish start in front of the largest crowd in golf history.

Justin Thomas went the other way, wasting a brilliant opening run with another late meltdown.

Fowler shot a four-under 67 on Saturday to reach 14-under 199 with a round left at TPC Scottsdale’s Stadium Course, the fan-friendly layout packed with an estimated 216,818 fans on an 80-degree afternoon.

‘I really made some good swings coming in,’ Fowler said. ‘I just wasn’t getting the ball close enough and finally on the last few there I was able to get some good looks.’

Fourth-ranked Thomas, the PGA Tour player of the year after winning five times last season, birdied the first six holes to take the lead. But instead of making a run at his second sub-60 round in a little over a year, Thomas had to fight for an even-par 71 that left him eight shots back.

He dropped six strokes in a three-hole stretch, making a bogey on the par-four 14th, a triple bogey on the par-five 15th and a double bogey on the rowdy par-three 16th. On Thursday in the first round, he had a double bogey on the 16th and a bogey on the 17th.

Thomas left the course without speaking to the media.

Former Arizona State players Jon Rahm and Chez Reavie were a stroke back along with Bryson DeChambeau. Phil Mickelson was two shots behind, another former Sun Devils star riding the crowd support.

‘It means a lot to me,’ Mickelson said. ‘It’s very helpful and very important to my success. I think it’s been a big instrument in allowing me to get into the round and play and have fun and get out of the technical side.’

The crowd pushed the week total to 654,906 – just short of the record of 655,434 set last year.

‘It’s just a matter of time,’ Fowler said. ‘It would just be nice if it was sooner rather than later.’

The four-time tour winner began his birdie run with a 17-footer on 16 and connected from 9 feet on the par-four 17th and 18th holes. He also birdied 13 after playing the first 12 in even par with a birdie and a bogey.

‘I just kind of had to fight through it,’ Fowler said. ‘The swing was just a fraction off. It wasn’t bad, still made some good swings out there, but just had to try and get the ball in the short grass, get some looks and try not to make many mistakes.’

Rahm had a 65, playing alongside Mickelson and Schauffele for the third straight day. The 23-year-old Spaniard had five birdies in a seven-hole stretch on the back nine. He won two weeks ago in the California desert at La Quinta to jump to No 2 in the world.

Fowler is wearing a pin on his hat with a picture of Griffin Connell, the area boy he befriended at the event who died last week at age 7. Griffin was born with a rare airway disorder.

‘We actually had a ball go a little left on 11 today and we joked about it that Griffin took one in the chest and kept it out for us,’ Fowler said.