A bogey at the 18th left Scotland’s Robert MacIntyre with the narrowest of advantages after the third round of the weather-interrupted Texas Open on Sunday.
The world number 11 had seen his lead reduced from four shots to two by Swedish playing partner Ludvig Aberg through six holes when storms caused the third round to be suspended on Saturday.
When action resumed in San Antonio with players to complete both their third and fourth rounds, MacIntyre picked up a shot at his opening hole to give him a bit of breathing space over his rivals, only to drop a shot at the ninth.
The 29-year-old had looked on course for a two-shot advantage thanks to some solid play, but dropped another shot at the last for a round of 72 to see his lead down to one.
Aberg resumed with two bogeys in his first three holes but timely birdies at the 14th and 17th kept him in contention.
Also on the same mark are American Michael Kim, who shot a third round of 66 and his compatriot Andrew Putnam and Ryo Hisatsune who had 67s.
England’s Matt Wallace moved into contention with a round of 64 as he chased a second PGA Tour career win.