The 28-year-old, who is playing his rookie season after coming through the Web.com Tour Finals, carded an eight-under 64 to share the lead with Jason Dufner, Jerry Kelly and Jeff Overton.
Two others, Colt Knost and Jamie Lovemark were at 65 and another 11 players shot 66 each.
Playing on a sunny morning with very slight wind, two- time winner on European Tour last year, Lahiri did not miss a single green on Thursday.
He got his first birdie on the second and added three more on fourth, sixth and seventh to turn in four-under. A hat-trick of birdies from 11th to 13th brought him to seven- under after which he had just one more on 17th.
“I’m really happy with the way I started today. I was a bit unsure of how I was going to go today. Obviously still feeling all the travel from coming from Asia last week. But really happy with the way I hit the ball. I don’t think I missed a green all day. I felt really good out there,” said the World No. 41.
“This is a good golf course. I think that I like the way this particular golf course sets up. You’ve got to put it in play off the tee and then you have a lot of opportunities. So, I think it’s good, it’s good for people to come out and watch, because you see a lot of birdies,” he added.
Lahiri flew in straight from Malaysia, where he won his final singles against Shane Lowry at the EurAsia Cup.
Playing his first event on PGA Tour since the Hero World Challenge in Bahamas, Lahiri speaking of his off-season, added, “Well, I got a lot of rest, to start. I was playing three different tours last year and I was absolutely ragged by the end of the year.
“So I got some rest in (after Hero World Challenge), did some work on the body, got some good gym time in, and spent a couple of weeks with my coach (Vijay Divecha) before I started out last week. So, yeah, I feel ready to go.” .
PTI