Glover leads at Bethpage

The 2003 Masters champion from Canada posted eight birdies undone by a double bogey at the par-four sixth hole to sign for a six-under-par 64, two shots clear of Sweden's Peter Hanson with former world number one David Duval three shots behind following a 67. But that lead had disappeared as darkness fell over Long Island with tournament officials trying to squeeze in as much play as possible having lost most of Thursday to heavy rain.

Weir dropped two shots over the first nine holes of his second round with American Lucas Glover replacing him at six under, four under for his round after 12 holes and heading to the clubhouse as overnight leader.

PGA Tour rookie Ricky Barnes was a shot behind Glover having played the back nine first while Weir was tied for third with Hanson, who had played 11.

Former Open champion Todd Hamilton was at three under after 10 holes in fifth place while Japan's Azuma Yano had shot up the leaderboard and was four under for his round after 12. That put him in a tie for sixth at two under for the tournament with Denmark's Soren Hansen, Adam Scott of Australia, American Sean O'Hair and England's Ross Fisher, who had three birdies and a bogey playing the back nine first and reached his 10th when the hooter sounded to suspend play for Friday at 8:26pm local time.

American amateur Drew Weaver and Northern Ireland's Graeme McDowell were the best placed of the early starters from Thursday who were not scheduled to tee off until Saturday morning, their opening 69s good enough for a share of 12th place alongside Americans Gary Woodland, world number two Phil Mickelson and former world number one Duval.

Duval, who suffered an alarming dip in form following his victory at the 2001 Open Championship, was two over for his second round after 12 holes while Mickelson was level for his round having played 11.

Englishman Ian Poulter and Sweden's Johan Edfors were among a group of players at level par and waiting to begin their second rounds, joined by Americans Anthony Kim, JB Holmes and Canada's Stephen Ames, four under for the round after nine holes.

The increasing number of under-par scores began to cause concern for defending champion Tiger Woods, who had been at level par with four holes to play but finished his round with a run of double bogey, bogey, par, bogey to leave him with a four-over 74.