This casebook introduces the fundamentals of labor, antitrust, and intellectual property law as applied in the professional and amateur sporting industries. It covers the unique office of the league commissioner; the contract, antitrust, and labor law dimensions of the player-labor market; the peculiar institution of the player agent in a unionized industry; the economic and legal implications of agreements among league owners and responses to rival leagues; and more. It also covers issues of statutory interpretation, administrative law, and torts. This edition updates material on the business of sports with the latest antitrust, preemption, drug testing, and labor relations cases.