In a series of articles over the next few days, Football Outsiders will be looking division-by-division at the biggest weakness left on each team's roster after free agency and the 2015 NFL draft.
This edition examines the NFC North.
Chicago Bears
Biggest post-draft weakness: Secondary
You can really pick your poison with either cornerback or safety here, and unfortunately the Bears will have to. They have little in the way of surefire foundational pieces at defensive back. In fairness, switching to Vic Fangio's multiple 3-4 scheme requires a multiyear commitment to overhauling the old personnel.