NHL Players' Association Files Grievance Against League Over Concussion Protocol The National Hockey League Players' Association (NHLPA) has taken a significant step in its ongoing efforts to protect the health and safety of its players by filing a grievance against the league over concussion protocol. The move comes after reports of inconsistent application and delayed diagnosis of head injuries during the 2022-2023 season. The grievance is expected to lead to a formal hearing, where the NHLPA will push for stricter concussion protocols and better support for players who have suffered head injuries. As the league continues to grapple with the long-term effects of concussions, this development could have major implications for the future of the sport.