This really shouldn't come as much of a surprise, but the Titans have let Marc Mariani go. He was a favorite of the old regime, but he never proved that he could contribute as a receiver, and now they have better options at returner that can help in other places.
He had a good run with the team. He was unfortunate the last 2 years to have season ending injuries in the preseason. He will probably catch on with Jeff Fisher is St. Louis.