For a team with uncertainty at the top of the depth chart, the Patriots are running a revolving door of tight ends through the bottom.
According to Mike Reiss of ESPNBoston.com, the Patriots have released veteran tight end Ben Hartsock, who was signed Sunday.
Their top three tight ends — Rob Gronkowski, Michael Hoomanawanui and D.J. Williams — are either out of practice or limited with injuries.
Hartsock is a capable blocker who played well for the Panthers in recent years, but the Patriots apparently saw enough of him in a few days to move on. Of the three tight ends they signed Sunday, two are already gone.