The Packers have reached an agreement on a contract extension with starting right guard Josh Sitton. The former fourth-round pick was entering the final year of his rookie contract. "It's a big weight off my shoulders," said Sitton, whose agent began negotiations with the Packers around the start of training camp. "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."