I don't know if people are struggling to read the cues or what. Rodriguez isn't even worth talking about at least in terms of replacement. We can criticize him if we want, but he, Samson, McCoy are like bricks. Nothing suggests they are going anywhere. Congdon got NO run with those three. That suggests he is not even close--he is the oft-referenced Greentree All-American for now but he's a true freshman it is fine.
There are three guards. The question is basically who they will see as the two best. Cantwell was ok he didn't do anything better than the other two that I saw. His upside is physical and age. That is why I think Buchanon is more at risk. SJ can do things Cantwell can't--he just has a degree of suddenness and agility that the others don't. Nobody else that I've seen on this roster could get from RG to the left hash like SJ did on that screen to Barkate and I also suspect there is a reason why he is the guard pulling on pass pro on the first pass of the game also. I don't know how good he is because it's one game but it does very much seem to me that he has a physical skillset that they value and is unique.