Is Underground Fighting Legal in the United States?
The legal status of underground fighting in the United States is complicated, and the answer depends heavily on where you are, what type of fighting is taking place, and whether the event is sanctioned by a state athletic commission. There is no single federal law that governs underground fighting. Instead, legality is determined by a patchwork of state laws, municipal regulations, and the discretion of local law enforcement.
This guide breaks down the legal landscape for underground fighting in the US, covering bare knuckle fighting, unsanctioned events, mutual combat laws, and the regulatory framework that separates legal fight promotions from illegal ones.
Sanctioned vs Unsanctioned: The Critical Distinction
The most important legal distinction in American fighting is whether an event is sanctioned by a state athletic commission or not.
Sanctioned Events
Sanctioned events are combat sports contests that have been approved by the athletic commission (or equivalent regulatory body) in the state where the event takes place. Sanctioned events must comply with a set of regulations that typically include:
- Licensed promoters, fighters, referees, and judges
- Pre-fight medical examinations for all competitors
- On-site medical personnel, including physicians
- Insurance coverage for fighters
- Approved rules, weight classes, and equipment standards
- Post-fight medical suspensions when necessary
BKFC operates as a sanctioned promotion. Its events are approved by state athletic commissions, its fighters undergo medical checks, and the bouts are conducted under a formal ruleset. This makes BKFC events legal wherever they hold them, provided they have obtained the necessary commission approval.
Unsanctioned Events
Unsanctioned events are combat sports contests that take place without the approval of a state athletic commission. These events operate outside the regulatory framework, which means there are no mandatory medical checks, no licensed officials, and no formal safety requirements.
Most of what people think of as "underground fighting" falls into the unsanctioned category. Promotions like Streetbeefs, informal fight clubs, and backyard fighting operations do not seek or receive state athletic commission approval.
The legality of unsanctioned events varies significantly by state.
State-by-State Legal Landscape
States Where Bare Knuckle Fighting Is Explicitly Legal (When Sanctioned)
Several states have specifically legalized bare knuckle fighting and allow their athletic commissions to sanction bare knuckle events:
- Wyoming: The first state to sanction a bare knuckle boxing event in the modern era. BKFC held its inaugural event in Wyoming in 2018.
- Mississippi: Has sanctioned multiple BKFC events and has a regulatory framework in place for bare knuckle fighting.
- Florida: One of the most active states for sanctioned bare knuckle events, with multiple BKFC cards held in the state.
- Colorado: Has sanctioned bare knuckle events through the state athletic commission.
- Montana, New Hampshire, and others: An increasing number of states have added bare knuckle fighting to the list of combat sports their athletic commissions can regulate.
States With Restrictive Laws
Some states maintain laws that make bare knuckle fighting or unsanctioned combat sports explicitly illegal:
- New York: Has historically had strict regulations around combat sports, and unsanctioned fighting events are prohibited under state law. New York's athletic commission (the New York State Athletic Commission) is one of the most powerful in the country.
- Some states treat unsanctioned fighting as assault, regardless of whether both parties consent.
The Gray Area States
Many states fall into a gray area where underground fighting is not explicitly legal or illegal. In these states, legality depends on how local law enforcement and prosecutors interpret existing laws around assault, battery, and disorderly conduct.
In practice, this means that an underground fighting event could operate without legal trouble in one county while being shut down and prosecuted in the next county over within the same state.
Mutual Combat Laws
A handful of states and municipalities have mutual combat statutes that may provide a legal framework for consensual fighting. Mutual combat laws generally hold that if two adults consent to fight each other, neither party can be charged with assault.
States With Some Form of Mutual Combat Recognition
- Washington State: Has one of the most well-known mutual combat frameworks. Seattle, in particular, has been recognized for its approach to consensual fighting, provided it does not endanger bystanders.
- Texas: Has provisions that recognize mutual combat in certain circumstances, though the specifics depend on local interpretation.
- Oregon: Has mutual combat provisions under certain conditions.
Important Caveats About Mutual Combat
Mutual combat laws, where they exist, have significant limitations:
- They typically do not protect promoters or organizers, only the fighters themselves.
- They may not apply if the fighting causes serious bodily injury.
- They do not override state athletic commission jurisdiction over organized combat sports events.
- They do not protect against civil liability. Even if criminal charges are avoided, a fighter can still be sued for injuries caused during a fight.
- Recording and distributing fights may create additional legal exposure.
Mutual combat laws are not a reliable legal foundation for running a fight promotion. They may protect two people who agree to fight in a park, but they do not provide the regulatory cover needed to organize, promote, and profit from combat sports events.
How Underground Promotions Navigate the Law
Different underground promotions take different approaches to legal compliance:
BKFC: Fully Sanctioned
BKFC operates within the regulatory system. It works with state athletic commissions, obtains event licenses, and complies with all applicable regulations. This is the most legally secure approach but also the most expensive and restrictive.
Streetbeefs: The Voluntary Framework
Streetbeefs has operated for years by positioning itself as a voluntary dispute resolution service rather than a professional fight promotion. Fighters are not paid, participation is voluntary, and the organization has its own set of rules designed to minimize serious injury. Whether this model would survive legal scrutiny in a prosecution is an open question, but Streetbeefs has operated continuously for many years without facing significant legal action.
Backyard Fight Clubs: Maximum Risk
Unorganized backyard fighting that lacks any safety structure, rules, or organizational framework carries the highest legal risk. Participants can be charged with assault, and organizers can face charges related to promoting illegal fighting, endangering participants, and potentially operating without a business license.
Criminal Charges That Can Apply
When underground fighting crosses legal lines, several criminal charges may apply:
- Assault and battery: The most common charges. Even with mutual consent, prosecutors in some jurisdictions can charge fighters with assault if serious injury occurs.
- Promoting a fight: Some states have specific statutes that make it illegal to promote, organize, or profit from unsanctioned fighting.
- Reckless endangerment: If bystanders are at risk, organizers can face endangerment charges.
- Contributing to the delinquency of a minor: If underage participants are involved, the legal consequences escalate dramatically.
- Operating without a license: Organizing a combat sports event without the proper state licenses can result in fines and criminal charges.
Civil Liability
Beyond criminal law, underground fighting organizers and participants face significant civil liability:
- Personal injury lawsuits: A fighter who is seriously injured can sue the organizer, the opponent, and anyone involved in putting the fight together.
- Wrongful death claims: If a fighter dies as a result of injuries sustained in an unsanctioned fight, the legal exposure for everyone involved is enormous.
- Property damage: Events held on private property without proper insurance can result in liability for property damage.
- No insurance coverage: Unlike sanctioned events, unsanctioned fights typically have no insurance coverage for participants.
The Trend Toward Legalization
The broader trend in the United States is toward more states legalizing and regulating bare knuckle fighting rather than prohibiting it. The success of BKFC and the growing mainstream acceptance of bare knuckle fighting as a legitimate combat sport have encouraged more states to create regulatory frameworks.
This trend benefits everyone involved in the sport:
- Fighters get medical protections, insurance, and regulatory oversight.
- Promoters get legal certainty and the ability to operate openly.
- Fans get access to events that meet minimum safety standards.
- State governments get tax revenue from sanctioned events.
For more on the differences between regulated and unregulated fighting, see our guides to how to become a bare knuckle fighter and the injuries common in bare knuckle fighting.
The Bottom Line
Underground fighting in the United States exists on a legal spectrum. At one end, fully sanctioned BKFC events are unquestionably legal. At the other end, completely unregulated street fights are unquestionably illegal. Everything in between depends on the state, the local jurisdiction, the specific circumstances of the event, and whether anyone involved decides to press charges.
If you are considering participating in or organizing underground fighting, understanding the specific laws in your state and municipality is essential. The legal landscape is changing, and more options are becoming available for people who want to compete in bare knuckle fighting through proper channels.
For a look at how the legal framework differs in other countries, see our guide to underground fighting legality in the UK.