The Green Bay Packers have a philosophy they live by: develop through the draft.
They aren't big spenders in free agency, tending not to lure high-profile players to Lambeau. Instead, they draft players, develop them and re-sign them.
They have five players who will be impending free agents within the next few seasons that need to get extended long term. This season looks like a good time to do that.
Note: contract info taken from Rotoworld.