Antitrust Case Has Implications Far Beyond N.F.L.

Is the National Football League a single entity, or a collection of 32 teams that compete against one another every week?

The question forms the core of an antitrust case that will be heard by the United States Supreme Court next week. How the court rules could shake some pillars of sports law by reshaping the definition of a sports league, which would in turn affect professional leagues, teams and players, as well as the constellations of companies that do business with them.