Lahiri, who is coming off three Top-10s in his last four starts, had four birdies and an eagle against two bogeys in the round.
Lahiri, who plans to close for the year after this year, is currently 29th on the FedExCup list and 60th in World rankings.
He started with a bogey, but quickly made up with a birdie on third and on the fifth, he landed an eagle that took him to two-under.
Another birdie on eighth saw him turn in three-under. On the back nine, he birdied 11th and 17th, but bogeyed 14th.
Rickie Fowler, playing for the first time since the Presidents Cup showed no rust in opening with a 65. Kizzire closed with a 64 last Sunday in Las Vegas to tie for fourth. Vaughn Taylor played bogey-free for a 64.
Brandon Harkins, a 31-year-old PGA TOUR rookie, joined Fowler at 65, while two-time Retief Goosen was in the group at 66. Sean Jacklin, the grandson of British Open and U.S. Open champion Tony Jacklin, qualified Monday and shot 71 in his first PGA TOUR event.