Lamar Miller

Behind Dolphins RB Reggie Bush are two promising tailbacks in Daniel Thomas and Lamar Miller, whose skills complement one another. The Dolphins envision Thomas as the team’s third down back because of his hands, and ability as a blocker. Last year Thomas started out strong, but fizzled at the end, averaging just 3.5 yards per carry. The coaches believe participating in a full NFL offseason program should help Thomas, a 2011 second-round pick, regain the powerful rushing style he had at Kansas State.

Miller’s addition gives the Dolphins another tailback with sub-4.4 speed. He'll be sprinkled in, handling some of those scatback plays designed for Bush. However, the shoulder injury that tanked his draft stock remains a concern. But his addition makes Slaton expendable.