Guy, a standout athlete at Thomson High School and Southern Mississippi University, was a member of the Oakland and Los Angeles Raiders' championship teams in 1977, 1981 and 1984.
The three gold, diamond encrusted pieces of jewelry are the featured lot at natedsanders.com. The current bid, as of late Tuesday, was $13,110 and had yet to meet the reserve.
The auction runs through Aug. 9.
According to Sports Collectors Daily, the Super Bowl rings, which come with a letter of authenticity from Guy, are expected to sell for between $75,000 and $90,000.
CNBC sports business reporter Darren Rovell tweeted late Monday night that Guy has filed for bankruptcy and is forced to sell the rings.
Reached by cell phone Tuesday, Guy declined to go into details.
"I don't walk to talk about it," he said. "I'm not trying to be hateful, but sometimes you've got to do what you've got to do."
Guy joined his alma mater, Southern Mississippi, in 2007 and works at the school managing and directing the daily operations of the M-Club Alumni Association, including its membership recruitment initiatives, according to Southern Mississippi's Web site.
In 14 NFL seasons, Guy was a seven-time All-Pro, and he was named to the NFL's 75th anniversary team as the punter. He hasn't been elected yet to the Pro Football Hall of Fame, but Guy is in the Georgia and Mississippi halls of fame, the National High School Sports Hall of Fame and the College Football Hall of Fame.