The Dolphins have a few key players headed to free agency. Lamar Miller is one that the Dolphins should offer a new contract to.
The NFL is a pass-centric league and teams typically put most of their chips on the quarterback. A running back that can run, block and catch like Miller should not be taken lightly by the Dolphins.
An excellent football site is Pro Football Focus. Players are rated with a grading system. Lamar Miller is ranked second, by a small margin, from being the top free agent running back.
Sort that free agent list by age, youngest to oldest, and Miller, 24, is the youngest player at any position with a top grade in free agency, 85.6. The highest free agent grade of 94 belongs to Von Miller and Olivier Vernon. If the Dolphins are truly intent on developing their own talent, Miller's a keeper.
Our nemesis in the division is looking for a running back, please Miami, don't disrespect Miller so that he comes back to haunt us twice a year as a Patriot!