What present Suns player has the highest upside?

[JCSunsfan]

To me...upside means which player will make the most gains in their basketball skill sets.

Knight and Bled are almost to their ceiling which is why I didn't vote for either.

Actually, the idea of the most upside is "who has the potential to be the best player?" Not "who can make the the most improvement from where they are right now?"

At least that is what I intended by the poll. Y