The United States District Court for the District of Columbia has held that the National Football League's annual college draft is a concerted refusal to deal amounting to a group boycott, and is thus a per se violation of section 1 of the Sherman Act.
Smith v. Pro-Football, 420 F. Supp. 738 (D.D.C. 1976).
Donn A. Clendenon,
Antitrust - Restraint of Trade - Group Boycott - NFL College Draft,
Duq. L. Rev.
Available at: https://dsc.duq.edu/dlr/vol15/iss4/11