This is rather interesting...In our search for another good linebacker, I have come across one who has fallen from grace. Observe this: http://www.kcchiefs.com/depth_chart/

Former 4-3 Strongside Linebacker Derrick Johnson is listed as the 3rd string left inside linebacker. I suppose his transition to the middle in the new 3-4 in Kansas City has been a rough one, and since we are looking for a trading partner to get rid of Reggie and AJ, this would make some sense.