Well, well, well…
The NLRB now needs to issue a preemptive ruling stating that retaliation for unionizing on campus is a violation of labor laws, because that’s the first thing these fuckers will start going after. And it needs to be more than just fines from the NLRB, it needs to allow for civil lawsuits from both individual players and their newly-formed unions. 
If they want to draw the line on unionizing in the locker room, or even on sports related grounds, light practice areas, fine. But the Rest of campus should be fucking off limits, especially because most students also happen to also live there, especially those receiving scholarships and student aid, as those who play on sports teams most often are.
Not to mention the fact that it will save the NLRB a huge amount of time, administrative costs, and a a lot of good people a lot of misery from fighting off a huge amount of challenges moving forward by just shutting down the possibility of them happening in the first place.