According to the Miami Herald, the Dolphins "would be fine" leaning on 2012 fourth-round pick Lamar Miller as their lead runner in 2013.
The Dolphins haven't ruled out re-signing Reggie Bush, but they'd only entertain it if his asking price dropped dramatically. The Herald's Barry Jackson suspects the Fins might make a "cheap addition" to battle Daniel Thomas for the backup role. Jonas Gray, a power back out of Notre Dame who spent 2012 on PUP, is another interesting prospect, potentially capable of upgrading on Thomas as a short-yardage specialist. Miller's fantasy stock is looking up for 2013.