Posted by ESPN.com's Kevin Seifert
Let's run through our nightly catch-up of today's free agency news around the NFC North. Check back for late-breaking updates:
Detroit re-signed running back/kick returner Aveion Cason and also signed former Tennessee linebacker Cody Spencer. That makes three former Titans who have joined new Lions coach Jim Schwartz: Spencer, cornerback Eric King and offensive lineman Daniel Loper. Spencer is primarily a special teams player who spent the past three seasons with the New York Jets. Cason has been with the Lions off and on since 2001.
Minnesota re-signed cornerback Benny Sapp, who served as the Vikings' nickel back after Charles Gordon dislocated his ankle midway through last season. Gordon re-signed last month.
Green Bay fullback John Kuhn, a restricted free agent, was scheduled to visit Cincinnati. The Packers will have the right to match any offer Kuhn receives.