Lions S Tracy Walker entered Week 11 questionable with a right knee injury that cost him the previous 2 games. He left Week 11 early with a right knee injury. HC Matt Patricia said afterward that he didn't know whether it was the same injury, according to ESPN's Michael Rothstein. We'll see about the outlook here, but IDP owners should expect to miss Walker for at least the next game. Even with Walker active against the Cowboys, Tavon Wilson and Will Harris still started at safety. Wilson looks like a full-timer whether Walker's in or out. Harris' role depends on Walker's involvement.