How long will it last?

[EPL0c0]

DBoys put up an interseting post about Jones/Barber and how they benefit from the rotation. But that got me thinking, how long can we keep the both of them on the roster?

In particular, will another team see Marion Barber as an every down back and go after him? This isn't a case like NYGiants have, where a young Brandon Jacobs appears to be the heir apparent to an older Tiki Barber.

Can we really keep two talented RBs on the roster for the long haul?