"Per a league source, the Dolphins released cornerback Richard Marshall on Tuesday. Originally drafted by the Panthers six years ago in round two, Marshall spent six years in Carolina followed by one with the Cardinals. He signed a three-year contract in 2012 with the Dolphins.Injuries limited Marshall to four games in his first season with the Dolphins. In early November, Marshall landed on injured reserve.Cutting him allows the Dolphins to avoid a $4.55 million base salary. He instantly becomes a free agent."