Zach Zaidman @ZachZaidman Multiple sources tell WSCR that Rod Marinelli will not be #Bears defensive coordinator under new head coach Marc Trestman. This is a bummer. I was liking the idea of an offensive coach overhauling his side of the ball and keeping the defense more or less intact. One of the things I'm most concerned with Trestman's lack of recent NFL experience is a lack of relationships with top notch defensive talent. At this point I think they have 3 options, A) Bring in some recently fired head coach with a defensive philosophy, or an available DC. A Lovie type, although obviously not Lovie. Sort of what GB did with Capers. Or a Rob Ryan/Eric Mangini type. This could help on 2 fronts, the well respected defensive mind who has his own list of contacts for assistants, and assisting the raw head coach in the broader aspects of the job. B) Promote somebody else in the system to maintain continuity. The drawback of this is you obviously start watering down the quality of the staff when an assistant comes up and then has to hire people under him. C) Find somebody else's up and coming defensive mind and go from there. I think I'd prefer C. Like when STL took Lovie from TB's linebacker coach to their DC and turned around a dismal unit. B would be nice, but the Bears D was Lovie, and to a lesser extent Marinelli. Take away those two guys, plus their purported right hand man in Babich and I think you're diluting the quality a bit too much. Running this style of defense without using the best could be a disaster.