NHL Players to Undergo Concussion Protocols After On-Ice Collisions In a move aimed at enhancing player safety, the National Hockey League has announced that players will be required to undergo concussion protocols after being involved in on-ice collisions. The new rule change comes as the league continues to grapple with the long-term effects of head injuries on its players. The protocols will involve a series of tests and evaluations to determine whether a player has sustained a concussion, and will dictate their return to play. The move is seen as a significant step forward in the league's efforts to protect its players from the devastating consequences of head trauma.