Is humanoid robot fighting legal? What California and Wyoming have actually said
California ordered REK to stop unsanctioned human-versus-robot fights; Wyoming has only a draft framework; REK argues a match needs two persons. No court has ruled.
Nobody has yet answered the question in a court, and the two regulators who have said anything about it have said different things. As of 12 October 2026, the honest answer is that it depends on who is in the ring.
ROBOT AGAINST ROBOT
Most humanoid robot fighting is two machines and no human in the cage: UFB, URKL, SCL, ARC, RFC and the rest. The record shows no regulator ordering any of these to stop. California's letter, described below, is explicit that it concerns contests involving a human. That is an absence of action, not a ruling that robot-only fights are lawful everywhere. Local venue rules, product safety and import rules apply as they would to any event, and this site does not give legal advice.
HUMAN AGAINST ROBOT: CALIFORNIA
On 23 September 2026 the California State Athletic Commission sent REK a cease-and-desist letter headed "UNSANCTIONED HUMAN VERSUS HUMANOID ROBOT CAGE FIGHT", signed by executive officer Andy Foster. REK's founder Cix Liv published it on 30 September. The trigger was the 18 September fight in San Francisco in which an EngineAI T800 piloted by REK knocked down the boxer and YouTuber Frankie LaPenna.
The letter is addressed to anyone holding, promoting, advertising or sponsoring such fights, and tells them to stop staging any boxing or mixed martial arts contest involving a human in California without the commission's approval. It does not mention robot-against-robot fights. Which statute it rests on is reported inconsistently, so this record has not printed a section number and will not until the letter can be read in full.
THE "TWO PERSONS" ARGUMENT
Liv's reply is a legal argument, not a retreat: "The law clearly states that a 'match' is between two persons." On that reading, a contest with one person in it is not a match the commission regulates, and a humanoid robot is not a person. He has said he would welcome a court test. No court has ruled, and the commission has not published a response to the argument. Until one does, it is a position, not a precedent.
WYOMING: A FRAMEWORK, NOT A LAW
Wyoming has gone the other way, in draft. In November 2025 Cowboy State Daily reported that Bryan Pedersen, chair of the Wyoming Combat Sports Commission, had drafted what may be the first US rules for robot combat sports. The draft defines a "synthetic combatant" as "any electromechanical, mechatronic, or software-driven system designed to engage in regulated combat sports activity". It would cover hybrid bouts between humans and machines, each needing case-by-case approval and extra medical oversight; require licences for robot operators, comparable to those for trainers and referees; require a failsafe shutoff that referees and commission inspectors can operate; and ban projectiles, fire, chemical agents and high-voltage electricity.
The report describes a draft. This record has found no evidence that it has been adopted, and it is marked unverified rather than in force.
WHAT THIS MEANS
A promoter who wants a human in the ring currently has two published models: California's, where the answer is to get commission approval first, and Wyoming's draft, where a path to approval is written down but not yet shown to be law. A promoter who keeps humans out is, for now, outside both. That is why REK's 9 October "Deathmatch" in San Francisco was staged robot against robot; the result of that card is covered separately on this site.
Related rules that are not about fighting but matter to it are on the Context page: the FCC's July 2026 notice on foreign-produced robotic devices, the Pentagon's June listing of Unitree, and the 2022 pledge against weaponising general-purpose robots. Each is described there as what the notice says, not as legal advice.