American Lucas Glover made five birdies in the 13 holes he played in the second round of the weather-delayed US golf Open to hold a one-shot lead when play was halted due to failing light.
Glover, who played 31 holes at Bethpage Black after being washed out of the rain-marred opening round, stood at six under par for the tournament following his opening 69.
American Ricky Barnes, who posted a first-round three-under 67, improved to five-under through nine holes of the second round.
The New Zealanders David Smail and Douglas Batty both began round two badly - Smail dropped from even par to 6 over through 14 holes, while Batty is 7 over after 6.
Both look likely to miss the cut.
Michael Campbell will begin his second round on day three, not long after the title holder and world number one, Tiger Woods, who after 18 holes is on 4 over par.
Day one of the Open saw barely three hours of play when heavy rain chased the players off the course.
They came back early on day two to complete the first round and then gave way to the second wave of competitors, who played their first round and went back out to start the second.
A similar pattern will be followed for day three, which is scheduled to resume at 7.30 a.m. local time, (10.30 p.m. NZT)