Samwise still has his ephemeral youth. If he wants to play and can still play, let him play. Sheilds might have to face the music when his youth withers, as most of us do, but life's a short trip anyway. As Napoléon Bonaparte once said, "In my bygone youth, I fought gloriously, fucked greedily and lived humbly."
While Shields was never a shutdown corner, he was a pretty damn good corner for an undrafted free agent. He's probably still better than any of the hocus-pocus corners currently on the Packers' roster. I, for one, would love to see Shields back in the Green and Gold.