Buffalo's RB Situation

I wanted to sum up the mess that is Buffalo's backfield currently.  Fred Jackson has broken a bone in his hand, and he is out for the rest of the preseason.  He is also in danger of missing a regular season game or two.  He was heading into the season as the lead back in this mess, but he is now in danger of losing that role.  Marshawn Lynch sprained his ankle, but he is expected back as soon as the last preseason game.  C.J. Spiller has a huge opportunity to seize the starting job the next couple weeks.  I had originally ranked him as overrated because of all the veteran competition, but he is in complete control of his destiny.  He's not going to be a goal line back, so his upside is limited, but he's comparable to someone like Jamaal Charles last season.  His play-making ability would fit well into a team that does not have a solid offensive line nor a passing game.  I would draft Spiller the first of the three now as I think his talent will win out, and he's got the best upside as a RB3.  I wouldn't take Jackson as anything more than a RB4.  Lynch is mostly an afterthought.  I'm curious to see how Spiller does the next couple weeks.