J.L. Lewis, Scott McCarron and Ted Purdy share the clubhouse lead at 3-under-par 69. Brett Quigley also stands at minus-3 through 16 holes, while Ryuji Imada is 3 under through 11 holes.
Tournament officials have officially reduced the tournament to 54 holes with the final round slated for Monday. The first round will resume Sunday at 8:00 a.m. ET, with the second round starting no earlier than 9:00 a.m.
That will make it two straight Monday finishes on the PGA Tour, as last week's Players Championship at Sawgrass was pushed back due to inclement weather.
It marks the second event to be shortened this season, joining the Nissan Open, which was cut to 36 holes.
Mayfair got off to a good start as he rolled in a birdie putt at the first at the TPC at Sugarloaf. The 38-year-old joined the leader at minus-3 thanks to birdies at the fourth and sixth, both par-5s.
Mayfair, a five-time winner on the PGA Tour, reeled off six straight pars around the turn before draining a birdie try at the par-4 13th before play ended for the night.
'The hardest part when it's cold and you have delays, it makes it hard to stay warm,' said Mayfair. 'I made four birdies and they all were between 10 and 20 feet. I made some nice putts.'
McCarron got off to a rough start with a bogey at the first after pulling his drive left off the tee. He got back to even par for his round when he sank a 9-foot birdie try at the third.
The two-time winner of this event moved into red figures with a birdie at the fifth. McCarron got to 2 under at the eighth after he dropped his tee shot 2 feet from the hole. His lone back-nine birdie came at the par-4 17th, where he sank a 6-foot putt.
'I think that old saying, 'one shot at a time,' is all I was doing, because all you're thinking about is staying warm,' McCarron said. 'I hit a shot, put on some more clothes, put a ski cap on, gloves on, walk down the fairway, take it all off and hit that shot. So it really keeps you Point A to Point B and hit that shot from Point A to Point B. I play my best when I'm doing that.'
Lewis began on the back nine and birdied the 11th before tripping to a bogey at the next. He converted back-to-back birdie tries from the 14th. The two-time winner bogeyed the third, but came right back with a birdie at four. He closed with a birdie at the ninth to end at minus-3.
Purdy also played the back side first and opened with a birdie on the 10th. He later wrapped bogeys at the 16th and 18th around a birdie at 17. The 31-year-old dropped in consecutive birdies from the fourth. Like Lewis, Purdy birdied the par-4 ninth, his last.
Quigley posted one birdie and one bogey on the front nine. He turned it on around the turn. He birdied the 10th, then sank back-to-back birdie tries from the 13th to get to 3 under. He parred his next two holes before play was halted.
Imada started on the 10th tee and birdied two of his first three holes. After seven pars in a row, he birdied No. 2, his 11th, before play ended for the day.
Bo Van Pelt shares seventh place with 2002 PGA Championship winner Rich Beem at 2-under 70. Also at minus-2 are two-time Masters champion Jose Maria Olazabal, John Huston, Tag Ridings and Hideto Tanihara, who all have several holes to play in their opening round.
Zach Johnson, the defending champion, opened with a 3-over-par 75.
Nine players withdrew prior to the event starting, while Paul Gow (85), Brett Wetterich (81) and D.J. Trahan (80) withdrew after their rounds.