The Chicago Bears have a fairly young secondary. Among the players in regular rotation at safety and corner, the only one with more than 3 years of NFL experience is cornerback Tracy Porter. He actually leads the Bears in both interceptions (2) and in passes defended (9), but those numbers aren't all that impressive.
Chicago needs better play from their defensive backs, in particular their safeties. So far through 13 games, the four players that have combined for the bulk of the safety reps, Adrian Amos, Harold Jones-Quartey, Deon Bush and Chris Prosinski, have a combined for 1 interception, 8 passed defended, 1 forced fumble, 1 fumble recovery and no sacks.