Looks like he played at Fork Union this past year after committing to Temple out of high school.  

By "already on campus", I take it that you mean enrolled, so that he will be eligible for Spring practice?

He was rated:
2 stars, 5.3 by Rivals
2 stars, ranked 159 best safety by Scout
2 stars, 74 by 116th best Safety ESPN
73 by 247Sports

Note that the the name spelling is different at the different services, which sometimes happens for under-the radar guys. Normally they clean it up when they sign the LOI, but since he apparently never did, it never got cleaned up. He indeed was on the roster of Fork Union last year, as a WR/SS, with the name spelled DyQuan.

I don't think he's the corner we need, but we can use some depth at safety, too.

Pleading ignorance here. 

Is this considered going to a "prep" school like a 5th year of high school vs the JUCO route and allows a young man to prepare for college academics while training in his sport without burning a year of NCAA eligibility?

If so, not a bad place to recruit.

Ohio has done well with recruits from Fork Union. Mark Parsons, Skyler Allen, and Jamil Shaw are some of the more recent ones. Hargrave has given Ohio a few good players, too, such as Ernie Hodge. Milford Academy in New Berlin, NY is another prep school that churns out good players, but I can't think of any Ohio players that played there. There was a prep school in Cincinnati for awhile called Harmony Prep, and Vince Davidson was a recruit from there but there were a lot of questions about that school, and it ended up closing, I think.