Sanchez has had some low-lights to be sure but he's played some solid to good ball under Schottenheimer. He's still young and his experience and relative success as a starter coupled with him only being 27 and familiar with the Rams offense makes him seem like a pretty good choice for backup. Would there be a QB controversy? I don't think so but it would be a way for the Rams to hedge their bets and not be forced to draft a QB if Bradford gets injured again. Sanchez is young enough and capable enough to take over as a potential starter and at worst a stop-gap if 2014 proves the negative and the Bradford era ends.
Now, would Sanchez sign with the Rams banking on the long term potential? It'd be a risk, especially if there are starting jobs out there for him. Doubt he signs quickly as a backup. I think he'll fare better out of New York. He's got his warts but I think that's been a tough environment for QB's for a while.
So, while I'd gladly sign him to an appropriate contract for a backup for the Rams, I don't think it's going to happen.