Play has been suspended at the Memorial Tournament in Ohio due to fading light, leaving Bill Haas atop the leaderboard with the second round still to be completed.
The 31-year-old American carded a 67 - one better than yesterday - to get to nine-under-par at Muirfield Village. He is three clear of his compatriot Matt Kuchar, who signed for a two-under round of 70.
Overnight leader Charl Schwartzel (-6) has not been able to replicate his dazzling form of yesterday and will resume on the 16th tomorrow one-over for his second round.
The South African is joined on six-under by Bubba Watson and Kyle Stanley, who will pick up their rounds at the 15th and 14th respectively.
Elsewhere on the leaderboard, Rory McIlroy (+2) has made a recovery from his disastrous start. He ended the day on four-under with four holes of his second round left to play.
The Northern Irishman is joined on two-over by Luke Donald, but Lee Westwood has slipped to six-over and will miss the cut.
