Sam Shields signs his Packers RFA tender

With a long-term deal possibly in the offing, Packers defensive back Sam Shields has made the first move toward multi-year security. Per a source with knowledge of the situation, Shields has signed his one-year restricted free agency tender. He’s now under contract through 2013, at a salary of $2.023 million. Undrafted in 2010, Shields had…