I'd take him as a backup if the Rams don't extend Jimmy G, for the very same reason I like Jimmy G as a backup - it is almost impossible, in a salary cap era, given how much cap space good QBs demand, to have two bonafide starters on the roster. So what you need is either a QB on a rookie contract (if he can be a future starter, so much the better), or a veteran that does not command huge dollars but has proven he can win at the NFL level in spurts. Daniel Jones and Jimmy both fit the latter description. I prefer Jimmy G as he's headed even contending teams and taken them pretty deep into the playoffs. But Daniel Jones has shown he can win games in this league, and even on meh teams. He can keep the ship afloat if the starter goes down for the short term.