Dolphins place Richard Marshall on injured reserve

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The Dolphins gave cornerback Richard Marshall a three-year, $16 million deal as a free agent this offseason, but they won’t get any further return on the investment this season.

Howard Balzer of the Sports Xchange reports that the Dolphins have placed Marshall on injured reserve with a back injury. Marshall’s arrival made the team feel comfortable enough to trade Vontae Davis to the Colts and things went well enough in the early part of the season as Marshall had an interception and 18 tackles in the first four weeks. He’s been hurt since then, however, and he’ll now have plenty of time to recover before getting back on the field.

Nolan Carroll has started in place of Marshall for the last four games and figures to remain in that role the rest of the way with Jimmy Wilson playing the nickel corner role. The Dolphins are coming off a game when they allowed Andrew Luck to throw for 433 yards, a much worse performance than we’ve grown accustomed to seeing from them this year and one that won’t be turned around by a return from Marshall this season.

The Dolphins have also reportedly claimed cornerback Brandon McDonald off waivers from the Buccaneers. McDonald has played in eight games for the Bucs this year, starting twice and snaring one interception.