It's pretty clear that Lamar Miller will be the Dolphins' starting running back this season. That leaves Daniel Thomas with the short-yardage and goal-line work. But even that may be taken away from him. According to Omar Kelly of the South Florida Sun Sentinel, "The Dolphins are concerned about Thomas' durability, and his ability to be the big, physical goal-line runner this offense needs. The Dolphins will likely add another young back or two via the draft."
Thomas hasn't played in more than 13 games in either of his first two seasons.
People might read into this and think it means the Dolphins could hand all of the duties over to Miller. But this is more about Thomas' future with the team. It's no secret that Thomas' roster spot will be on the line this summer. These concerns that the Dolphins have may lead them to simply cutting their 2011 second-round pick and signing another goal-line RB. Miller is not small at 5 feet 11, 212 pounds. But he has just 51 career carries, and I doubt Miami will risk wearing out out its 21-year-old starter. No matter if Thomas is with Miami or not this season, Miller probably won't be getting many carries inside the 10.