The 28-year-old Indian, who has been giving himself good starts, but none better than this one, has time and again faltered over the weekend.
Hoping to rectify that trend, Lahiri, who is due to play in Hero Indian Open after this event, finished superbly at Palm Beach Florida, which is his base in US and a home away from home.
Lahiri had a sedate start of sorts with two birdies but more importantly without any bogeys. His birdie on the second from nearly 24 feet seemed to set the trend, but he had only one more birdie on eighth on front nine.
PGA Tour rookies, Cody Gribble and Wesley Bryan shot six-under 64 each to share the top spot, and Lahiri along with two-time Major winner Martin Kaymer was third.
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Sergio Garcia and fellow Spaniard Rafa Cabrera-Bello, who plays at Hero Indian Open next month, shot two-under 68 each to be tied-24th on a day when more than half of the field was at par or better.
Lahiri's best in this 2016-17 season has been tied-third at the CIMB Classic, which was held in October 2016, but is counted towards 2017 PGA Tour season.
Kaymer chipped in from behind the 17th green for birdie and closed with a two-putt birdie from 40 feet for a 65. Rickie Fowler and Ian Poulter were in a large group at 66.
Bryan, who is known for his trick-shot videos, is coming off his best tournament, a tie for fourth at Riviera in which he got within two shots of winner, Dustin Johnson in the third round. Gribble already has won this season at the Sanderson Farms Championship last fall while the top players were in Shanghai.
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