John Huston closed his 6-under 66 with four birdies on the back nine to move to 12-under 132 on Friday and share the lead with Marino (67) and Overton (67) after two rounds of the low-scoring Wyndham Championship.
This is the eighth time Huston has led after two rounds during a career that spans two decades, with the previous time also coming here two years ago when he was 12 under and finished tied for 17th.
The 46-year-old, seven-time tour winner is in search of his first PGA victory since the 2003 Southern Farm Bureau Classic in Madison, Miss.
"When you're younger and win it's, 'OK, I'm going to win every week,'" Huston said. "Then it doesn't happen, and you get frustrated and down on yourself and, you know, then I'm going to appreciate how hard it really is to win, how well things have to go."
Anders Hansen (64), Tim Petrovic (65), Craig Kanada (65), Carl Pettersson (67) and Greg Kraft (67) were one stroke back. Steve Wheatcroft (66) and Nathan Green (66) were two strokes behind the leaders.
First-round leader Will MacKenzie (71), who opened with a 64, joined 10 other players three strokes back.
It was another hazy, humid, low-scoring day at Forest Oaks Country Club, where temperatures were once again in the mid-90s. An early weather delay of 2 hours, 3 minutes had little effect on the scores, which remained low
- as has become customary at this event.
The 36-hole cut of 5 under was the lowest on the tour this year and the lowest since the tournament moved across town to this course 30 years ago.
"A 62 is definitely out there - not just for me, but for anybody," Marino said, referring to the course record. "The course is lending itself to low scores and a lot of birdies."
Huston had his second straight 66, opening his round with eight straight pars and finishing it with birdies on four of seven holes from Nos. 12-17, closing that run on the par-3 17th by landing his tee shot 10 feet from the flagstick and holing out.
"I'm happy with the way I've driven the ball, hitting a lot of greens and giving myself chances
- that way it doesn't put that much pressure on my putting," Huston said.
Both Marino and Overton are in the lead for the first times in their brief PGA careers.