Dolphins position breakdown: RBs

The Miami Dolphins missed the playoffs with an 8-8 record in 2013. That means there will be plenty of questions of how to improve this offseason.

ESPN.com’s Dolphins page continues its roster evaluation by taking a look at Miami’s running backs.

Under contract in 2014: Lamar Miller, Daniel Thomas, Mike Gillislee, Marcus Thigpen

Free agents: None

Analysis: The Dolphins have a lot of running backs, but not a lot of answers. Lamar Miller didn’t make the most of his first year as the full-time starter. He rushed for just 709 yards and averaged 44.3 yards per game. I wouldn’t be surprised if Miami’s new general manager looks for an upgrade via the draft or free agency. Former second-round pick Daniel Thomas (406 yards) also is looking like a bust. Mike Gillislee, a 2013 fifth-round pick, was mostly inactive last year and still has a lot to prove. Marcus Thigpen is the team’s primary kick returner and could keep a similar role in 2014.

Walker’s stability meter (1 to 10, 10 being most stable): 3