The Tribune-Review talked to Ryan Clark, and he says he wants his friend, Troy Polamalu, to not rush back against the Lions:

Ryan Clark is one of Troy Polamalu’s closest friends. And as one of his closest friends, Clark felt obligated to offer Polamalu some sound advice. “I don’t want him to (play Sunday against Detroit),” Clark said. Clark is worried that the artificial surface at Ford Field will do more damage to Polamalu’s recovering knee if his friend decides to play Sunday when the Steelers visit the Lions. “I tore my PCL a few years ago, and (turf) is just tough to run on,” Clark said. “It is a pounding. Some of them aren’t very fluffy. Me personally, I would rather have him for the last 10 (games) or the last stretch rather than have him come out and injure himself again and set himself back.”