Just thought I'd post this here seeing as Sean or the other mods here haven't picked it up yet.
Urlacher leaves as Chicago's all-time leader in tackles. Bears GM Phil Emery had this to say about the move:
Brian has been an elite player in our league for over a decade. He showed great leadership and helped develop a winning culture over his time with the Bears. We appreciate all he has given our team, on and off the field. Brian will always be welcome as a member of the Bears.