Henley builds PGA Tour lead to six shots

Will Gordon bogeyed the 18th hole for a 68 to fall even farther back, tied for second with Patton Kizzire, who had a 67.

After starting the day with a three-shot lead, Henley finished it at 22-under 191.

Equally impressive by Henley was going bogey-free, the only player in the field who has yet to drop a shot at El Camaleon in Playa Del Carmen.

He will be going for his fourth career victory, and first since the 2017 Houston Open.

This round had plenty of stress compared with the opening two days, though that made it feel more satisfying because of the key putts he made that saved par and kept momentum in his favor.

"The score was good, but it just felt harder," Henley said. "It was my favourite of the three days because it wasn't easy."

Seamus Power of Ireland, coming off a win in Bermuda, had a 63 and was seven shots behind in fourth place. His round featured a hole-in-one on the eighth hole, and he didn't even get the stage to himself.

Greyson Sigg moments later made an ace on the par-3 10th hole, and Sigg didn't even realize it. He hit 7-iron, hit it well, knew it was a good shot but needed to get to the bathroom, and so he rushed off to the clubhouse near the tee.

"We couldn't see it go in, no one really made any reaction," Sigg said. "So I threw my club to my caddie and I took off and I came in the locker room, went to the bathroom, and as I was walking out, one of the locker room attendants was like, 'Great shot. Hole-in-one.' And I was like, 'No way.'"

Two-time defending champion Viktor Hovland had a 66 and lost ground. He now is nine shots behind. 

Masters champion Scottie Scheffler had a 68 and was in the middle of the pack, 13 shots behind and without much chance of regaining the No.1 ranking.

The only Australian remaining in the field, Jason Day carded a 67 to be 35th at nine under.