The Giants, who are one of the worst teams in the NFL, just cut him. Bringing him in, in no way improves this team. Is he better than Rush? Sure, but that's really not saying much. Is he so much better that he would help us win games. No. Is it really help for us at this point to win games? Probably not. In addition, he would have to learn the offense, that would take at least a few weeks. So we are looking at probably week 15-16 at the earliest that he could reasonable start and even that is a stretch. He would have no chemistry with any of the players. There is just no real reason to sign Jones, at least for this season.
Now, if he wants to sign a multi-year deal to be a backup for next season and on? I think that would be great...It might cause a bit of a QB controversy at times. But I think he'd rather take his chances somewhere where he'd have a better chance of having a starting position, like Oakland, than signing here under those circumstances.