Thomas followed up his amazing opening round of 59 with a second round 64 to lead over Gary Woodland with another two shots back to Zach Johnson, Hudson Swafford and Justin Rose.
For Thomas it was a PGA Tour record opening 36 holes score of 123 and he was clearly happy with the way things are going.
“I'm comfortable," said Thomas perhaps stating the obvious. “I like this golf course and I'm playing well. I think that's the biggest difference more than anything. Some of the times I got in contention last year, I wasn't playing that great. I just kind of -- they were harder courses and I just kind of weaseled my way in the hunt, which you can do.
“But a day like today, I felt like I didn't -- although I hit a lot of great shots, I didn't necessarily have my best around the greens or everything like that. So it was nice to shoot a round like that today.
“It's definitely the best of my career. I definitely haven't shown the world my best golf. I haven't even shown the world great golf, or consistent, great golf. I understand it's tough to get everything clicking, and everything isn't clicking for me. I mean, everything's good, but rounds like yesterday happen when everything's clicking.
“I think I'm getting more confident and I'm improving, too. I'm doing a lot of hard work with my dad and putting coach, Matt Killen, this off-season to work on my weaknesses. I think I'm just trending up and hopefully -- wanting to show everyone in the world what I have.”
Woodland has played well at this venue previously including when 3rd two years ago and has played very well in his most recent starts including when runner-up at the Mayakoba Classic in Mexico late last year.
Woodland birdied five holes in a row from the 6th hole and although five shots from the tearaway leader he appears to be playing well enough to add a 3rd PGA Tour title to his career CV.
Cameron Smith leads the Australians at 8 under par and in a share of 13th position after his second round of 68 while Rod Pampling and Marc Leishman are two shots further back sharing 34th while Cameron Percy also made the cut but is further back.
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