Previewing Dolphins' 2016 free agents: RB Lamar Miller

AP Photo/Michael Perez

The Miami Dolphins are 4-7 with little hope of making a playoff run. With that in mind, it's time to take an early look this week at the team's pending free agents and major decisions that are looming in 2016.

First up is Miami's starting running back.

Pending free agent: Lamar Miller

Experience: Four years

2015 stats: 567 rushing yards, five touchdowns

Reasons to re-sign: Production has never been an issue for Miller, who is only 24 and about to enter his athletic prime. His biggest challenge in Miami's offense is getting enough opportunities. Former offensive coordinator Bill Lazor's penchant to ignore the running game has impacted Miller, especially this season. But he is still averaging 4.8 yards per carry. Miller also has made strides as a receiver out of the backfield and already has a tied a career-high with 38 catches for 341 receiving yards. Running backs no longer get major paydays on the open market. The Dolphins have a chance to keep Miller at an affordable rate.

Reason to let walk: Miller has failed to prove he can be a "bell cow" on offense. He's never had 20 carries in a game in four years because questions remain with his durability. The Dolphins continue to search for a bigger running back to pound between the tackles and drafted rookie Jay Ajayi, who is making a push for more playing time. Also, with a new coaching staff likely taking over in 2016, a smaller and quicker tailback like Miller may not be the preference.

Chances of staying in Miami: 60 percent