defensive coordinator Mike Zimmer, the former head coach of Vikings, is joining the Cowboys as their defensive coordinator 10 months ago Mike Zimmer has returned to the NFL, the place where it all started. NFL Network Insider Tom Pelissero said that… Jeff Hafley of Boston College joins the Packers as defensive coordinator 10 months ago The Green Bay Packers announced on Wednesday that Jeff Hafley, the head coach of Boston College, would take over as… LSU hires ex-Mizzou DC Blake Baker as new highest-paid assistant coach 11 months ago Blake Baker of Missouri was named LSU's new defensive coordinator on Friday by Brian Kelly. According to a source, the…