The free agent market has opened. So unless some last-minute deals occurred but have gone unannounced, we can now refer to the following prominent NFC North players as unrestricted free agents:
Offensive tackle Chad Clifton
Defensive end Aaron Kampman
Linebacker Larry Foote
Running back Chester Taylor
Offensive lineman Mark Tauscher
These players are free to return to their original teams, but historically that doesn't happen too often once free agency begins.