I would try to buy low on Rosen. He was a good prospect coming out, but his stock is very low right now.
First off, he said some things that rubbed NFL personnel guys the wrong way.
Second, he had a very bad rookie season in which he struggled greatly. I agree that he was put in a brutal situation, but the facts are the facts. It was ugly.
If it's true that Arizona wants Kyler Murray, then I bet you could get Rosen for some kind of trade that didn't involve just surrendering a first round pick.