Rules shape careers. A fighter who does not understand the current rulebook is walking into the cage at a disadvantage before the first exchange is thrown. Over the past two years, the Unified Rules of Mixed Martial Arts have gone through meaningful revisions, and the most significant of those updates, the August 2025 overhaul of judging criteria, is already influencing how professional bouts are scored at the highest level. If you are a fighter, a coach, or a manager, this is not paperwork you can afford to skip.
Here is a clear breakdown of what has changed, what it means inside the cage, and how you can adapt.
The body that writes the rules: understanding the ABC
Before getting into the specifics of recent changes, it helps to know who is actually responsible for them. The Unified Rules of Mixed Martial Arts are governed by the Association of Boxing Commissions and Combative Sports (ABC), the body that coordinates athletic commissions across the United States and beyond. Individual commissions and regulatory authorities decide which version of the rules applies to a given event, meaning that adoption can be staggered from state to state and country to country.
The Unified Rules were first adopted in 2000 and ratified by the ABC in 2009. They have been amended multiple times since, most recently in August 2025. Understanding that these rules are a living document, one that gets updated at the ABC's annual conference, is the first step to staying current.
The August 2025 overhaul: damage takes centre stage
The most consequential update of the current cycle was approved at the ABC's 37th Annual Conference in August 2025. The judging criteria were substantially overhauled to place the concept of damage at the heart of scoring. This is not a minor wording adjustment. In the previous guidelines, the word "damage" appeared just once. In the new version, it appears seventeen times.
The ABC defines damage as "legal fighting techniques, the results of which lessen an opponent's capacity and/or will to compete." That definition matters because it moves scoring away from purely counting strikes or rewarding positional control, and toward measuring what those strikes and positions actually produced.
The key practical changes for fighters and corner teams are:
- Damage is now the primary scoring factor. Judges assess rounds on damage first. If a judge cannot determine a marginal advantage in damage, only then do they move to aggressiveness or fighting area control.
- A 10-8 round now requires damage. Under the previous framework, a combination of dominance and duration could, in theory, justify a 10-8. Under the updated rules, dominance and duration alone are no longer enough. Actual damage must be present for a judge to award a 10-8 round.
- Aggressiveness and fighting area control are no longer tiered. Previously, judges were guided to assess these secondary criteria in a hierarchical order. Now, when damage alone cannot separate two fighters, judges defer to whichever of those two factors "impacted the round in a more significant manner."
- Defense is not scored. The updated language explicitly clarifies that only offensive actions are scored. Surviving a barrage or avoiding takedowns is not rewarded by the judges; what matters is what you produced offensively.
- Cumulative damage counts. A fighter who steadily depletes an opponent's stamina, confidence, and spirit across a round can be credited with significant damage even without a single dramatic knockdown moment.
What a 10-8 round actually looks like now
For fighters who train specifically to win rounds on the scorecards, the revised 10-8 criteria deserve close attention. The updated rules specify that a 10-8 round requires offensive actions that may include dominance with duration, but that must include significant damage resulting from effort or attempts which, by their nature, could finish the fight.
The rules further clarify that significant damage alone is sufficient to warrant a 10-8, and that significant domination accompanied by some damage and little to no offensive return from the opponent may also be enough. Cumulative damage, such as a fighter visibly losing energy, confidence, or will to engage, qualifies under the new language.
In practical terms: holding top position for three minutes is no longer a guaranteed 10-8. You need to be producing meaningful harm, not just weight.
The scoring system itself: still the 10-point must
For all the changes to judging criteria, the underlying scoring system remains the 10-point must. Three judges evaluate each round individually. The winner of a round receives ten points; the loser receives nine or fewer. A 10-10 round remains possible but is reserved for situations where neither fighter has established any advantage, typically in partial rounds.
Bouts are capped at five rounds of five minutes each, with a one-minute rest between rounds. The referee remains the sole arbiter of the bout and the only individual authorised to stop a contest, though regulatory authorities can review a decision via video if a protest citing a clear rule violation is filed.
Fouls that fighters and corner teams still get wrong
Regulatory updates aside, several fouls remain persistent sources of confusion, costly point deductions, and occasional disqualifications. From our experience working cageside with fighters at different levels of the sport, these are the ones that catch people out most often:
- Eye pokes. Outstretched fingers toward an opponent's face remain one of the most common and penalised fouls. Glove design has been a subject of debate at the elite level, precisely because certain designs encouraged this habit.
- Head butting. The head may not be used as a striking instrument in any form, whether head-to-head, head-to-body, or any other contact. Any use of the head as a striking tool is illegal.
- Fish hooking. Any attempt to use fingers to attack the mouth, nose, or ears, stretching the surrounding skin, is a foul.
- Groin strikes. These remain a foul regardless of whether contact was accidental. Recovery time is factored in by the referee.
- 12-to-6 elbow strikes. Downward elbow strikes delivered in a straight, twelve o'clock to six o'clock motion remain prohibited. Angled elbows are legal.
- Grabbing the cage fence. Gripping the cage for positional advantage or to prevent a takedown is a foul and is penalised with warnings and point deductions.
What this means for fight strategy and training
The shift toward damage-first scoring has real consequences for how smart fighters and teams should approach preparation and in-fight adjustments.
For strikers: volume alone will not carry rounds the way it once might have. Judges are now explicitly directed to weigh what those strikes produced, not just how many landed. Precision and power become more important than pace.
For grapplers: controlling top position without generating damage is now penalised in scoring terms. Wrestlers and jiu-jitsu fighters who dominate positionally need to show active attempts at submissions, ground and pound, or advancing positions that threaten a finish. Lay-and-pray is effectively the worst tactical choice under the current rules.
For corner teams: the new framework gives corner teams a clearer language to use between rounds. If your fighter is winning on damage but losing on fight area control, you can now coach specifically to that gap because you know which factor judges will apply and in what order.
At BDZ Management, we build this kind of regulatory awareness into our approach from the moment a fighter joins our roster. Understanding how a fight will be scored is as important as understanding how to win it.
European fighters: where the rules apply and how they differ
For fighters competing in Europe, the picture is more complex. The Unified Rules are the gold standard, but individual commissions and regulatory authorities decide which version applies to their events. European promotions may operate under national regulatory bodies that adopt the ABC framework partially or with local adaptations.
This creates a practical challenge: a fighter competing under a European promotion may face slightly different foul definitions, different referee instructions, or different medical suspension protocols than they would at an event sanctioned by a US state commission.
The core framework, the 10-point must system, the prohibited techniques, and the general scoring criteria, remains consistent across most reputable promotions. But the fine print matters. Knowing which ruleset governs your bout before fight week is non-negotiable. It is one of the reasons that professional management, the kind that involves actually reading the sanctioning body's rules for each event, not just the standard template, is worth its weight.
Medical suspensions and weight-class regulations
Outside of judging, two other regulatory areas routinely catch fighters off guard.
Medical suspensions after a KO or TKO. Most commissions enforce mandatory rest periods following a stoppage. A sixty-day suspension after a knockout is standard in many jurisdictions, with no contact for the first thirty days. These timelines affect scheduling and must be factored into a fight calendar from the moment a contract is signed.
Weight-class regulations and missing weight. Missing weight on the scales carries consequences that go beyond the financial. A fighter who misses weight may be disqualified from competing for the title, face mandatory financial penalties payable to the opponent, and in some jurisdictions, risk licence suspension. The weigh-in is not a formality; it is a regulatory requirement with real teeth.
Staying current: why rules literacy matters more than ever
The MMA rulebook has never been static, and the pace of revision is accelerating. The ABC has held annual conferences that have produced substantive changes in 2016, 2017, 2018, 2019, 2023, 2024, and again in 2025. A fighter who last reviewed the rules two years ago is behind.
Rules literacy is not a glamorous part of fight preparation. It does not film well and it does not generate highlights. But it is the kind of quiet competitive edge that separates fighters who understand the game from those who simply play it. Know the rules that govern your next bout. Know the criteria the judges are using. Know what a 10-8 round looks like under the current standard. That knowledge belongs in the corner with you on fight night.