The California State Athletic Commission (CSAC) has intervened in the emerging trend of robot-human combat sports by issuing a cease-and-desist letter to a startup known as Rek. This regulatory action follows a public event held on September 18th, which featured a match between human content creator Frankie LaPenna and a humanoid robot.

The robot, which appears to be a model from the company EngineAI modified with a custom head, was controlled by a human operator using a remote virtual-reality interface. Rek, which markets itself as the "humanoid robot fighting league," has not yet publicly detailed its response to the commission's order.

While the event was presented as a novel form of entertainment, the CSAC's involvement highlights the regulatory uncertainty surrounding combat sports involving non-human participants. The commission has not provided specific details on the legal grounds for the cease-and-desist, but the move suggests a potential conflict between state athletic regulations and the operation of experimental robotics in public performance settings. The event has sparked broader questions about safety standards and the classification of "combat" when one participant is a machine piloted by a remote user.