Miami released Ferrell on Monday.
Ferrell initially made the Dolphins' 53-man roster, but he was one of several players let go Monday to make room for Miami's successful waiver claims. Ferrell is a vested veteran, so he immediately becomes a free agent. The Clemson product has extensive NFL experience and racked up 4.0 sacks over nine regular-season games between the Chargers and 49ers last year, so he could be an attractive option for teams looking for help on the edge.