That's a really tough question. Martin is obviously near the end of his career, and who knows where Ricky is, both physically and mentally. Dillon is a great back, but he too has some years on him. McGahee showed a lot last year, but his injury would concern me. And then there's Brown, who obviously has a lot of potential, but has yet to play an NFL game. So, right at this point in time, I think Dillon is the best back of the 5, but if I had to choose one based purely on the Dolphins' situation, I'd have to take Brown over McGahee, simply because our O-line won't get fixed overnight and I would be scared to death that McGahee would get hit one too many times behind the line (which isn't to say that Brown wouldn't, but he hasn't had the injury that McGahee did).