The team announced the deal on its website Friday, but did not disclose terms. Sitton, whose current contract expires at the end of this season, confirmed on his Twitter account he will be a Packer for six more years. Sitton thanked the organization and fans for their support.
Sitton, a fourth-round draft pick out of Central Florida in 2008, has started every game for the Packers since the beginning of the 2009 season. According to the team, he is the only player on either side of the ball not to miss a snap over the past two years, including the postseason.
"It's a big weight off my shoulders," Sitton said, in comments distributed via the team's website. "That was what we said from the beginning, that we wanted to get it done before the season. That way I didn't have to deal with it and I could just focus on playing football. That's what I do. I'm a football player."
Sitton said he didn't want to explore free agency.
"This is where I wanted to end up," he said. "It's a first-class organization. I love the way things are done here."