This from rotoworld:

Titans promoted secondary coach Chuck Cecil to defensive coordinator.

A former onetime Pro Bowl strong safety and vicious hitter, Cecil was fined several times for helmet-first hits during his playing days. Coach Jeff Fisher is defensive minded and the scheme won't change, but Cecil will bring nastiness to the position formerly held by new Lions coach Jim Schwartz. Its seems he will be more like Gregg Williams than Jim Schwartz what do you think?

[UPDATE from Jimmy]- Here is the story on the official site.  Press conference at 3.