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Rules of MMA

The Unified Rules of Mixed Martial Arts, adopted by the New Jersey State Athletic Control Board in April 2001 and now the de-facto global standard, govern almost every modern MMA bout. Below is a working summary covering scoring, fouls, methods of victory, and the rule variations applied by ONE Championship and PFL.

10-Point Must Scoring

Each round is scored independently. The judge picks a round winner who receives 10 points; the loser receives 9, 8, or 7 depending on the degree of dominance:

  • 10-9 — close round; winner did slightly more damage, dictated more exchanges, or accumulated more control time.
  • 10-8 — dominant round; clear damage, significant control, or a near finish. Used more liberally since 2017 guidance updates.
  • 10-7 — one-sided beatdown. Vanishingly rare in three-round bouts; the bout would normally be stopped first.
  • 10-10 — only when judges genuinely cannot pick a winner; discouraged.

The three judges' scorecards are totaled at the end of the bout. The fighter with two or more rounds is the winner. Split decisions (2-1), majority decisions (2-0-1 draw counted), and unanimous decisions (3-0) are the three possible verdicts when no finish occurs.

Methods of Victory

  1. Knockout (KO) — opponent is rendered unconscious or unable to intelligently defend themselves due to strikes.
  2. Technical Knockout (TKO) — referee stoppage due to strikes, corner stoppage, or doctor stoppage; also includes injury TKOs from legal strikes.
  3. Submission — opponent taps physically (mat or attacker), verbally taps, or makes any submissive vocalization.
  4. Decision — bout reaches the end of regulation rounds and judges' scorecards decide.
  5. Disqualification (DQ) — fighter commits an intentional foul that incapacitates the opponent.
  6. No Contest — accidental foul, injury from a foul (intentional or accidental) before three rounds in a three-round bout, or other irregularity.

Fouls

The Unified Rules list 31 fouls. The most commonly enforced:

  • Headbutting
  • Eye gouging of any kind
  • Biting or spitting at an opponent
  • Hair pulling
  • Fish hooking
  • Groin attacks of any kind
  • Putting a finger into any orifice
  • Throat strikes of any kind, including grabbing the trachea
  • Strikes to the spine or back of the head
  • Downward 12-to-6 elbow strikes (removed from the rules in 2024)
  • Soccer kicks (to a grounded opponent — legal in Pride, some ONE bouts)
  • Knees to the head of a grounded opponent (legal in Pride, some ONE bouts)
  • Stomping a grounded opponent (legal in Pride)
  • Holding the fence or shorts
  • Timidity (avoiding contact or intentionally dropping a mouthpiece)
  • Throwing an opponent out of the ring/cage
  • Spiking an opponent on their head or neck

A foul results in a warning, point deduction, or DQ depending on intent and impact. Five minutes is the maximum recovery time the fouled fighter gets before the bout must continue or be declared a No Contest.

Scoring Criteria (Order of Priority)

  1. Effective Striking and Grappling — the totality of damage and offense.
  2. Effective Aggressiveness — only when 1 is too close to call.
  3. Cage/Ring Control — only when 1 and 2 are too close to call.

The 2017 guidance update emphasized damage as the primary driver: a fighter landing fewer but more impactful strikes can win a round over a fighter landing higher-volume but lower-impact offense.

Rule Variations

ONE Championship

  • Soccer kicks and knees to a grounded opponent permitted in some bouts (signaled to the fighter pre-fight).
  • Hydration-tested weight cuts: scale weight 24h pre-fight + urine specific-gravity test.
  • Open scoring after each round.
  • Modified scoring criteria emphasizing damage, near-finishes, and aggression.

Professional Fighters League (PFL)

  • Regular season + playoffs format; scoring follows Unified Rules.
  • Bonus points for finishes (3 for round 1, 2 for round 2, 1 for round 3).
  • SmartCage data overlays (live punch counts, speed, force) shown to viewers.

Pride FC (historic)

  • Soccer kicks, stomps, and knees to a grounded opponent legal.
  • 10-minute first round, 5-minute second round, optional 5-minute third.
  • Scored as a whole fight rather than round-by-round.
  • Yellow cards for timidity (200,000 yen / ~$1,500 USD penalty per card).