AKRON, Ohio (AP) -- Without the world's No. 1 player around, Vijay Singh and Phil Mickelson brought some star power Friday to the final World Golf Championship of the year.

Singh twice escaped from the trees on his closing holes at Firestone and renewed his affair with a belly putter on his way to a 4-under 66 at the WGC-Bridgestone Invitational, putting his name atop the leaderboard for the first time in more than four months.

He was one shot ahead of Mickelson, who made another great escape at the end of the second round, this time holing a 20-foot par putt to finish off a 66 that put him in the final group with Singh.

Both have three majors -- two Masters and a PGA Championship for Mickelson, two PGA Championships and a Masters for Singh -- along with some history. They got into a heated argument during a rain delay at Augusta National over the length of Mickelson's metal spikes. A year later when they played two rounds together in Phoenix, Singh asked that Mickelson's driver be tested to make sure it was legal.

Both have more pressing concerns this week, mainly getting their games back in order with the PGA Championship looming.

"I'm going to go out there and play my heart out and try to shoot as low as I can, and not really be concerned about what Phil does," said Singh, who was at 7-under 133. "He's going to be focused on his game. I just hope we both have a good day."

Sean O'Hair, seeing immediate results from switching to a new swing coach, had a 67 and joined the group at 5-under 135 that included Lee Westwood (65), former Masters champion Zach Johnson (68) and Peter Lonard (66).

Sixteen players were within four shots of the lead.

"It's anybody's ball game," said Hunter Mahan, who had a 66 and was at 3-under 137.

It helps that Tiger Woods isn't at Firestone, particularly since he is a six-time champion on this course and had never finished out of the top five in his 10 appearances.

"To me, him not being here is the difference between 39th and 38th," Lonard said with a laugh.

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