There was a nearly four-and-a-half-hour delay to the start of the tournament due to inclement weather. Tournament organizers sent the players out in threesomes off both the first and 10th tees and all 77 golfers finished their rounds.
Tom Jenkins is alone in third place after a 4-under-par 68. It should come as no surprise he would do well here since his last three finishes in this tournament were a tie for fourth, a runner-up and a tie for second place.
Jim Ahern, John Harris, Scott Hoch, playing for the second time on the Champions Tour, and two-time winner this year Brad Bryant are knotted in fourth place at 3-under-par 69.
Roberts parred his first hole on Friday, then hit a 4-iron to 12 feet to set up birdie at the second. He parred his next two, then went on a birdie run that immediately shot him up the leaderboard.
At the par-4 fifth, Roberts, nicknamed the 'Boss of the Moss,' rolled in a 30-footer for birdie. He holed a 12-foot birdie putt at six, then sank a putt from half that distance to polish off three consecutive birdies.
Roberts tallied four pars in a row around the turn, but nearly made a mess of the par-5 12th. He got up and down for par from 130 yards, then collected his final birdie at the 17th when he made a 10-footer.
'I'm really happy with how I played today,' said Roberts, who has not played on the Champions Tour since Pebble Beach the first week of September. 'I feel rested after four weeks off and hope to keep things going. I hit the ball well today and made some putts.'
Adcock flew out of the gate with back-to-back birdies at one and two. He recorded additional front-nine birdies at five and seven to make the turn at 4-under-par 31.
Adcock was not as solid on the second nine. He also scrambled at the 12th, converting a 15-footer for the save. Adcock birdied 13, but had a chance for sole possession of the lead. He missed a 4-footer at the 17th, but is in a relatively familiar position.
At the AT&T Classic earlier this year, Adcock open qualified for the event and fired a 5-under 67 to earn sole possession of first place. He ended up tied for 17th at that tournament, but knows the key is avoiding one bad round.
'In a three-day event, you can't afford a poor round,' said Adcock, who shot an 80 in the final round in the AT&T Classic. 'You can't throw anything away in three days.'
Tradition winner Eduardo Romero, last week's Greater Hickory Classic champion Andy Bean, Mark McNulty, Chip Beck, Tim Simpson and Joe Ozaki are tied for eighth place at 2-under-par 70.
Defending champion Hale Irwin struggled on Friday. He shot a 4-over-par 76 and is part of a group tied for 66th place.