I think the potential is obvious, Daves. Murray’s highs are very high. I believe it was Bill Walsh (I am not sure about that, though) who have said to judge a player by his best play, and then it is up to the coaches to get it out of him. Now, he said it in regard to draftable players, but I think the point is the same in the Murray-case. Going by that theory, there are certainly many NFL coaches with big enough self-esteem to believe that they can get the maximum out of Murray.
There are several teams that are desperate for quarterbacks, and another way to look at Murray’s value is to ask what Plan B is for those teams? By all accounts, the quarterback class in the draft is not impressive, and there will most likely only be one or two quarterbacks on the free agent-market worthy of a bigger contract. There will surely be teams that miss out on those few options, which could easily lead them to Murray.
The Cardinals are most often among the bad teams in the NFL. I am sure there are many other teams that will believe they can do better than the Cardinals.