With Titans' defensive coordinator Jim Schwartz heading to Detroit for a second interview with the Lions, ProFootballTalk has been told that Schwartz?s current team is convinced that he?ll be leaving. Per a source with knowledge of the situation, the Titans already are lining up potential replacements for Schwartz. One candidate is Gregg Williams, who worked as the defensive coordinator in Tennessee before becoming the coach of the Bills in 2001. Williams is under consideration for the defensive coordinator positions with the Saints and the Packers.