Cashman went to Eden Prairie.
He reminds me quite a bit of Grayson Levine (in HS). They also had a kid a few years ago named Michaelson who went to Wyoming (I believe). Carter actually played a similar position with Eden Prairie (which is why he was sometimes listed as a SS on recruiting websites).
It's essentially a SS who played reaally close to the line and was really more of a LBer. All of these guys were good enough athletes to pretty much do everything, in HS. So they would rush the passer at times, play like a FS at times, but they would usually play like an outside linebacker.
Blake isn't a good enough athlete to play SS. He'll be a LBer and he'll play situationally (as Claeys described).