This is stemming from my (outta left field) hypothetical, where JDS would not be living in Lincoln for this final (Spring 2020) semester. He would be taking online courses to finish out the credits he needs to graduate with a bachelor's from Lincoln, living in the Cities, presumably with his parents, and working out on his own. Perhaps through his dad's connections, he could use the Vikings' resources (facility, strength coaches, maybe hire a personal trainer, etc.)
I don't think he would be allowed to have any affiliation with the Gophers team at that time, because he would not be enrolled at the U of MN. He would be finishing his UNL degree.
THEN starting in May (or maybe the summer), he could enroll at the U, and workout on campus.