Tennessee signed Vannett to the 53-man roster Thursday, Aaron Wilson of KPRC 2 Houston reports.
Vannett was cut by the Titans on Wednesday to make room for a waiver claim, but he was expected to return to Tennessee, per Terry McCormick of TitanInsider.com. Vannett is part of a crowded tight-end room made up of Chigoziem Okonkwo, Josh Whyle (concussion), Thomas Odukoya and David Martin-Robinson.