What player has the most upside in a dynasty league?

Isaiah Pead (Richardson seems to have stolen his rookie season)
Lamar Miller (Behind Bush and Thomas but he is only 21)
Vick Ballard (Has shown the most out of all these guys)
Bernard Pierce (Ray Rice isn't going anywhere)
Bryce Brown (Same as above, McCoy isn't either)
Jamie Harper

We're talking upside, it has to be Pead.

Many concerns about his size. Do you think he's undersized to get a big role in St. Louis?

Hard to say until he fully plays. He's pretty much the same size as Jamaal Charles...and his main competition in Richardson. If Richardson is involved there, can't see how they'd dislike Pead.

Thats very true they are similar in size. Lets hope so because I picked him up in my dynasty league because we have real deep benches and I saw a report saying the Rams are looking to get him more touches in their crowded backfield. Hope he pans out I always liked him in college.

I'd actually have to say Lamar Miller. Don't forget he was supposed to be a first round pick! He has plenty of skills but has to learn the offense first.

That's very true. Miller is good. But who has a chance at a job sooner him or pead? I would lean pead even with Richardson there.

You are right that pead will get the job sooner, but miller has the higher upside. So it's a matter of preference.