Lahiri, who had a great start in the first round with a 68, is now six-over for three rounds. He had just one birdie in the entire round, on par-3 16th.
Lahiri had three other bogeys and then had two doubles on his own back nine, at the fifth and ninth holes, after starting from the 10th.
Meanwhile, Kevin Chappell survived a roller-coaster front nine with three birdies, one double bogey and three bogeys. He also had two provisional shots, neither of which he needed to use.
Chappell is ahead of first-round leader Branden Grace, who rallied with two-under 70, and John Huh, who after an eagle-birdie finish, shot 71.
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Ryan Palmer, a West Texas native also handled the winds as strong as 25 mph well to shoot four-under 68. He is joined at six-under by second round co-leaders Bud Cauley (74) and Tony Finau (74), Sweden's Carl Pettersson (71), 2013 Texas Open champion Martin Laird (71), Kevin Tway (72) and Australian Cameron Smith (73).
On Friday 49 rounds were under par, and 69 sub-par scores were recorded Thursday.