American Needle Inc. vs. NFL 2010. The US Supreme Court stated in it's unanimous opinion:
"Respondent National Football League (NFL) is an unincorporated association of
32 separately owned professional football teams..."
http://www.supremecourt.gov/opinions/09pdf/08-661.pdf
From an article covering the verdict:
"Despite the coordination needed to run the sports league, the NFL isn't a single entity but rather a consortium of 32 separately owned teams that compete with one another, Justice John Paul Stevens wrote for a unanimous court. The ruling reverses an appeals-court decision and sends the case back to lower courts to be reconsidered. The ruling deals a blow not only to the NFL, which has longed for the antitrust exemption baseball has enjoyed since 1922, but also other joint ventures that have been accused of restraining competition, such as credit-card giants MasterCard Inc. and Visa Inc., which originated as consortiums of member banks."
http://www.oyez.org/cases/2000-2009/2009/2009_08_661
http://blogs.wsj.com/law/2010/05/24/american-needle-high-court-delivers-9-0-shutout-against-nfl/
They have been unsuccessfully fighting it ever since. Lost another challenge to it last fall.
Not so much.