Major League Soccer referees protested outside the league’s headquarters after being locked out ahead of the beginning of the 2024 season. The lockout, a denial of employment by an employer during a labor dispute, was imposed on the referees after they overwhelmingly voted to reject a tentative new union contract agreement in a 95.8% vote, with 97.8% of the 260 union members voting. The union has also alleged unfair labor practices against the MLS and the Professional Referee Organization. The union cited members rejected the deal in part due to an attempt by the MLS and PRO to add a no strike and no lockout deal for the 2024 season and would have frozen wages, rolled back job security protections, and not addressed issues such as high workloads and travel for referees.