Lucas Glover overcame a sluggish start to move one shot clear in the Heritage Classic second round at Hilton Head Island, South Carolina on Friday.

In calm morning conditions at the Harbour Town Golf Links, the 28-year-old fired a second successive five-under-par 66 for a 10-under total of 132 in his bid for a second PGA Tour title.

The long-hitting Glover, one of three players tied for the lead overnight, hit a superb approach to within a foot on his final hole for a tap-in birdie three to finish a stroke in front of defending champion Boo Weekley (64).

"It's a good score but I made a pretty slow start," Glover told reporters after piling up six birdies and a lone bogey at the par-four 10th, his first hole. "My wedge and my putter kind of saved the round.

"I made some key par saves today, 16 and seven come to mind with maybe nine-footers. I didn't make a lot of 15, 18-footers but I didn't miss anything inside 10 (feet) either.

"I knocked it on in two on 15 and I think that kind of got things going," he added, referring to his two-putt birdie at the par-five 15th.

"It was the first real good swing of the day I made. After that, I was pretty solid."

Weekley, who won last year's tournament by a shot, surged up the leaderboard with a flawless seven-birdie display to match the lowest score of the week.

"I hit the ball real well with my irons although I struggled a little bit off the tee," the 34-year-old said.

"For some reason, I just ain't got a clue which way it's going. Today I got lucky and hit some decent drives and kept it in play on some of the holes where you need to."

American Anthony Kim birdied two of his last five holes for a 67 to lie two strokes off the pace, one ahead of compatriots Cliff Kresge (66) and 2004 winner Stewart Cink (68), plus Canada's Stephen Ames (64).

American world number nine Jim Furyk, runner-up at Harbour Town in 2005 and 2006, was among a group of seven bunched at six under after carding a 68.

Five-times winner Davis Love III and fellow American Justin Leonard, joint pacesetters with Glover at the start of the day, were tied for 14th at five under after matching 71s.

The halfway cut fell at one over with 75 players qualifying for the weekend. Among those missing out were South African world number three Ernie Els, 2001 winner Jose Coceres of Argentina and American Zach Johnson, last year's Masters champion.