The Dolphins are doubling down on running back additions in the wake of Alexander Mattison's season-ending neck injury.

With Alexander Mattison done for the season, the Dolphins are adding some running back depth. Read PFR for more.

The Miami Dolphins signed two free-agent running backs following the injury to Alexander Mattison, who is out for the season.

Free-agent running backs Mike Boone and Aaron Shampklin have signed contracts with the Miami Dolphins. The Dolphins wasted little time beefing up their running-back corps after they lost Alexander ...

Miami Dolphins rookie running back Ollie Gordon II had a solid debut this past Sunday against the Chicago Bears. In a 24-24 preseason tie, Gordon rushed for 33 yards on eight attempts, including a ...

The Dolphins signed Boone to a contract Monday. With Alexander Mattison (neck) being placed on injured reserve, the Dolphins bolstered their backfield Monday by adding Boone and Aaron Shampklin. Boone ...