American Charley Hoffman retained his lead on day two at the Houston Open after his two-under par round put him one clear in Texas.
Hoffman went into the second round with a one-shot cushion and he maintained that advantage on Friday after moving on to 10-under.
He was set to finish one shot better off but he bogeyed the last hole and that allowed Jamie Lovemark to move to within one of the lead.
Conditions at the Golf Club of Houston caused plenty of problems with the wind and rain unsettling many players.
Speaking after his round, Hoffman admitted he was pleased to come through without any serious damage to his chances of winning.
He told the PGA Tour website: “It was going a little shorter and some of those hazards you don’t think are in play suddenly become more dangerous. People say about ball hitting but it’s tough to putt in the wind.”
Lovemark’s second-round 68 gives him a great chance at the halfway stage but his one bogey let him down.
Wales’ Jamie Donaldson was the biggest mover but he has yet to finish his second round after bad light brought an early end to Friday’s action. He has moved to eight-under but still has three holes to play on Saturday morning.
The Ryder Cup winner climbed 29 places on the leaderboard and is joined by Chez Reavie, Dustin Johnson and Roberto Castro on -8.
Defending Masters champion Jordan Spieth stuttered to a one-over 73 and he will start Saturday’s round six shots behind Hoffman.