A reserve linebacker and special teamer, Mitchell started one game in 2012, but played only 46 snaps on defense. He'll serve in a similar role in 2013.
Dolphins signed LBMarvinMitchell, formerly of the Saints.
Mitchell fits best as an inside linebacker that is only asked to play on early downs. He'll give the Dolphins some depth there while trying to make the team as a special teamer.
Free agent LBMarvin Miller visited the Bengals Wednesday.
Mitchell profiled as a two-down thumper on the inside coming out of Tennessee, but he's been limited to special teams duty with the Saints the past four years.