That seems to be the issue. “Players may not have nonprofessional relationships with other players...” in the article.
So they are professional college ball players? Or do they have to get paid to have relationships with other players? Seems confusing to me.
I remember when working in a professional field, that the term was “do not fish in the company pool.”
But I have noticed that in companies I am affiliated now, that this rule has gone the bye. People from different sexual preferences all seem to be involved sexually and emotionally.
Bad for moral IMHO.
I guess sisters would be precluded under the non-professional relationship rule.