This one lands from out of the blue. Sitton, 30, hasn't missed a start since 2011, a testament to his durability at one of football's most rugged positions. He's been a second-team All-Pro three seasons running and finished 2015 as the league's fifth-rated guard, per Pro Football Focus.
"We want to thank Josh for his contributions during his time in Green Bay. He has been an important part of the success we have enjoyed on the field," general manager Ted Thompson said in a statement. "While these decisions are never easy, this was done with a focus on what is best for the team and the growth of the offensive line. We wish Josh and his wife, Kristen, all the best in the future."
The move appears linked to Green Bay's salary cap, as Sitton was due $6.5 million in the final year of his contract. Still, he's been worth every penny for the Packers, so it's fair to wonder if something else triggered the decision.
Sitton will hit the open market and certainly find work. While not a young player at this stage, plenty of teams could use a valuable and trustworthy interior lineman.