Guthrie was tested his first time in the last group on tour and made a collection of solid pars on his final eight holes for a 1-over 71. Thompson accepted his bogeys and finished with a two-putt birdie on the 18th for a 70.
They were at 8-under 202, and while the conditions were tough, equally daunting were some of the names behind him.
Lee Westwood, who moved his family down the road from PGA National over the Christmas break, rallied over the last five holes by chipping in for birdie, making an 18-foot birdie putt on the 17th and salvaging par after hitting into the water on the par-5 18th. That gave him a 70 and put him only two shots behind.
He was tied with Geoff Ogilvy, who appears to have snapped out of his putting doldrums that cost him dearly on the West Coast. Ogilvy recovered from three bogeys in four holes at the start of his round by making a 7-foot birdie putt at the end for a 70. The Australian summed up the day perfectly.
"Even par for the day was never going to go backward," Ogilvy said. "It was only going to go forward, and I did that."
Stacy Lewis shared the lead with Na Yeon Choi at the HSBC Women's Champions in Singapore after the South Korean birdied the 18th hole in a rain-delayed third round on Saturday.
Choi shot a 5-under 67 to tie the 28-year-old American at 14-under 202. Lewis, the overnight leader and reigning LPGA Player of the Year, had a 69.
Paula Creamer, who injured her shoulder in a car accident after a tournament in Thailand last weekend, shot 69 to trail the leaders by two shots.
Luke Guthrie -8
Michael Thompson -8
Lee Westwood -6
Geoff Ogilvy -6
Daniel Summerhays E