They should have gotten to the SB last year with him starting.
Something tells while disappointed he isn't the starter that he's sitting fine with the fat rookie contract under him, his ability to play okay and limit mistakes to a great degree, and free agency to look forward to.
He probably won't get paid handsomely but any team that thinks they can get a similar level of play would be foolish not to inquire. Do you have the right system for him is the only question. He's not going to carry your team every week, you might get a couple weeks a season but he's also shown that he's not going to sink you by turning the ball over left and right.
He's a prototypical bus driver QB. He's only thrown 10 INTs in his last 663 attempts. That's over two seasons so he's not a guy you want to air it out and he needs to be in a system that can avoid putting the pressure squarely on him. Still pretty impressive, IMO. I'd be there aren't too many QBs who throw fewer INTs as a percentage of the attempts. Brady and Rogers are the only one's I can find but only took a quick glance. RG3 is likely there although I'm pretty sure he had less than 400 attempts this year.
He's not a bad QB. He's just not someone who is going to make up for a ton of dead weight on the team. On the right team he could probably be a decent starter. Certainly better than a number of starters out there.
I think Arizona should take a look. They have some talent on offense and a better than advertised defense that will help avoid situations where he has to be expected to carry them back from large deficits.