ESPN Boston believes the Patriots could allow free agent C Dan Koppen to walk.
Koppen was sent to injured reserve after breaking his ankle in Week 1. Fellow C Dan Connolly is also a free agent, but is three years younger than Koppen, who will turn 33 in September. After Connolly struggled in both pass protection and run blocking this season, however, the Pats should be open to re-signing Koppen if the price is right.