"This reminds me of home to tell you the truth," Stricker said. "This looks like a course that could be very easily in the Midwest somewhere. It reminds me of Medinah a lot. The grasses are the same. We putt on poa annua greens a lot where I'm from. It's bentgrass fairways, bluegrass rough and everything reminds me of home."
The 41-year-old Stricker, 21st in the FedEx Cup standings, had a 10-under 132 total on the tree-lined A.W. Tillinghast layout, the tournament site for the first time after 41 seasons at Westchester. He hasn't made a bogey since dropping strokes on the first two holes Thursday, playing his last 23 holes in 11 under.
"I think the course is in such good shape, that's why the scoring is good," Stricker said. "I think as we get further along, the scoring could get a little bit better just because guys will find a way to play it, understand it a little bit more and feel a little bit more comfortable with what they are doing out there."
Mahan, 31st in the FedEx Cup standings, followed his opening 62 with a 73.
"I probably hit it better than I did yesterday, but nothing went in," Mahan said.
Kenny Perry, effectively the FedEx Cup leader with top-ranked Tiger Woods sidelined by a knee injury, shot a 67 to join Angel Cabrera (67) and Dudley Hart (69) at 6 under.
"I'm ecstatic," Perry said. "I'm in a good position."
Anthony Kim (67), Sergio Garcia (67), Kevin Streelman (70), Charley Hoffman (70) and Paul Casey (71) were 5 under.
"I definitely played a lot better," Kim said. "It's a lot more fun when you're not hitting out of the trees and chipping out sideways."
Phil Mickelson was eight strokes back at 2 under after a 70.
"A lot of birdies and a lot of bogeys," Mickelson said. "I need to go out (Saturday) and have a good day and shoot 6 or 7 under."
Padraig Harrington had rounds of 72 and 73 to miss the cut by two strokes.
"I'm tired," the British Open and PGA winner said. "I tried hard, but struggled to focus this afternoon. It really is a knockdown after the last couple of weeks."
Stricker eagled the par-5 third hole, hitting a 60-degree wedge shot from about 70 yards that spun back into the hole, and was 4 under after five holes. He hit a 5-iron to 20 feet on the par-4 11th to set up a birdie, and made a 6-footer on the par-5 13th to tie Mahan for the lead at 9 under. The four-time tour winner pulled ahead with a 12-foot birdie putt on the par-3 15th and closed with three pars.
The PGA Tour's comeback player of the year the last two seasons, Stricker hit nine of 14 fairways, 14 greens in regulation and needed only 25 putts on the small greens.