Does MMA Open Scoring Make Fighters Coast? What Data Says

Quick answer

The best available data does not show MMA leaders shutting down because scores are known. A 2025 study reviewed 3,646 UFC bouts and used clear score certainty as a stand-in for open scoring. After adjustment, clearly ahead fighters were 10.4 percentage points more likely to win round three. Across 11 action measures, their pace did not fall in a statistically detectable way. Trailing fighters changed more: they attempted and landed fewer takedowns and tried fewer submissions. That is not final proof. The UFC sample used inferred knowledge, not actual open cards, and every five-round bout was excluded.

Data snapshot: Gift analyzed 3,646 UFC bouts from Jan. 30, 2016, to June 30, 2023. Of 1,606 eligible three-round bouts, behavior models used N=354 leaders and N=441 trailing fighters. An LFA comparison covered 10 private-score cards and nine open-score cards.

What is MMA open scoring?

Open scoring reveals each judge's card after a round, usually during the one-minute break. Fighters, corners, and viewers can then know the recorded score. The judging criteria and 10-point must system stay the same. Only the timing of the information changes.

Under the usual UFC setup, the commission's scorekeeper has the cards while the fight continues. A corner can tell its fighter, “You are two rounds up,” but that is an estimate. The judges may have seen the same action differently.

Kansas approved optional real-time scoring in February 2020. Invicta FC first tried it the next month at Phoenix Series 3. Colorado approved the option in October 2021.

The UFC had never used open scoring through the period covered by Gift's 2025 paper. UFC regulatory executive Marc Ratner also opposed adopting it in 2024. This matters because the largest UFC study tests a close substitute for score knowledge, not the system itself.

Why does the fear of coasting sound plausible?

A fighter who knows he is ahead may protect the result. He can move more, clinch safely, or avoid risky exchanges. That is the basic case against open scoring.

Yet private scoring already creates the same behavior. Fighters often believe their corners, and a clear 20-18 lead can be obvious from the action.

Open scoring changes the other corner too. A fighter who knows a decision loss is coming can chase a finish or abandon a failing plan. The final round could become safer for one side and more urgent for the other. Looking only for coasting misses half the mechanism.

How did the 3,646-bout UFC study test open scoring?

Economist and former MMA judge Paul Gift built an observational test. The UFC supplied round-level data with more than 100 measures. These covered strikes, damage, knockdowns, takedowns, submissions, and position time.

How was the sample narrowed?

The period contained 3,646 UFC bouts. Of those, 3,288 were scheduled for three rounds and 358 for five. Only 1,940 three-round fights reached round three.

Gift then removed bouts with a point deduction or any 10-10, 10-8, or 10-7 card during the first two rounds. Those cases make “ahead” harder to define consistently. That left 1,606 bouts with complete cards and only 10-9 rounds before the third.

In 608 bouts, all three judges had one fighter ahead 20-18. A judging model required at least a 90% chance that each prior round went to that fighter. Only 164 bouts passed.

The comparison group contained 340 bouts where one fighter led on two cards, while the third judge had an even score or the opponent ahead.

What did “known” and “unknown” mean here?

The clear-lead group was the study's stand-in for known scores. The idea is simple: if the action and all three cards say 20-18, the fighter probably knows he is ahead. The uncertain group represented weaker knowledge.

That is clever, but imperfect. Gift used inverse-probability weighting to balance earlier performance between groups. The adjustment cannot turn the design into a randomized trial.

What happened in round three?

The results run against the simplest coasting story. Fighters with clearer knowledge of a lead won the final round more often, not less.

The adjusted UFC estimate cleared the 10% statistical threshold, not the stricter 5% threshold. In the judge-decision subset, the estimated increase was 12.9 points with N=222 and did clear 5%. There were too few third-round finishes for a sound adjusted finish estimate.

Did leaders reduce their activity?

The behavior model found no statistically detectable change across 11 measures for ahead fighters. The sample was 354 observations after the overlap adjustment.

The measures included strike attempts, landed strikes, knockdowns, visible damage, takedowns, submissions, and control. None moved enough to separate an effect from noise.

This does not prove every leader fights identically. The data cannot see tactical details such as safer shot selection, defensive footwork, or the force behind an exchange. It says the tracked actions did not show a broad retreat.

What changed for trailing fighters?

The clearer pattern appeared on the losing side. Across 441 observations, fighters with stronger reason to believe they were behind attempted fewer takedowns, completed fewer takedowns, and attempted fewer submissions.

Their striking pace, knockdowns, damage, and control time did not change detectably. Gift read the grappling shift as a possible move toward a standing knockout, but the model did not measure intent.

The submission result also weakened from the 5% to the 10% threshold in a second model check. Treat it as a clue, not a settled law of late-fight strategy.

What did real open-scoring events show?

A Kansas LFA comparison supplies direct evidence. Leaders won the final round 70.0% of the time across nine events with open scores. The rate was 57.9% across 10 LFA cards outside Kansas using private scores.

Those numbers do not prove the score display caused the difference. Events took place in different states, and the fighter mix was not randomized. Still, the pattern points the same way as the adjusted UFC proxy.

What do Max Holloway, Conor McGregor, and Nate Diaz show?

Max Holloway backed Invicta's 2020 trial and traveled to Kansas City to support it. His point was practical: MMA cannot learn whether a scoring change works without testing it.

Conor McGregor's five-round majority decision over Nate Diaz at UFC 202 shows a major blind spot. Their cards ended 48-47, 47-47, and 48-47. That bout falls inside Gift's date range, but the design excluded every scheduled five-round fight.

Title fights and most UFC main events sit outside the evidence. Open cards could affect rounds four and five differently, especially after a fighter builds an insurmountable lead.

What could open scoring fix?

Open cards solve an information problem. They tell a fighter when a corner's read differs from the official cards. That gives the athlete one last chance to change tactics before the result is locked in.

They do not correct a bad score. A judge can still reward the wrong fighter, misread damage, or apply the criteria poorly. Open scoring exposes the problem earlier. It does not reverse the round.

Transparency can create new pressure. A hostile crowd may react before the next round, and judges will hear it. The study cannot test that feedback or lost suspense.

What would a fair UFC test look like?

A useful trial would randomly assign open or private scoring within the same promotion and jurisdiction. That would reduce the event, matchmaking, and promoter differences in the Kansas comparisons.

The cleanest design would also:

• include both three-round and five-round bouts;
• separate scores shown only to corners from scores shown to the whole arena;
• publish every round card and a fixed list of activity measures;
• track finishes, action rates, fouls, and judging disagreement;
• run long enough to study divisions and fight styles separately.

If random assignment is impractical, matched events with the same venue, officials, and bout types would still improve the evidence.

How solid is this data?

Gift's peer-reviewed paper uses a large UFC window and states each exclusion. It checks behavior instead of relying only on win rates.

Its main weakness is built into the question. The UFC fighters were never shown their scores. Clear action served as a proxy for knowledge, and fighters in uncertain bouts may still have known they were ahead. Any misclassification can blur the estimated effect.

The study also removes 358 five-round bouts, all early 10-8 or unusual cards, and fights that ended before round three. Its clean sample is not the whole sport. The adjusted +10.4-point estimate is imprecise enough to miss the 5% threshold.

Kansas provides actual open scoring, but with fewer events and voluntary use. Its comparison mixes promotions and locations. Both bodies of evidence reject the easy claim that open cards plainly make leaders coast. Neither tells us what a full UFC rollout would do.

FAQ

What is open scoring in MMA?

Open scoring means judges' round scores are revealed before the fight ends, usually during the break after each round. The scoring rules stay the same; fighters and corners simply receive the official information earlier.

Does the UFC use open scoring?

The UFC had never used open scoring through the 2025 study, and UFC regulatory executive Marc Ratner publicly opposed adopting it in 2024. Kansas and Colorado have approved optional open scoring for combat sports, while promotions decide whether to use it.

Does open scoring make MMA fighters coast?

The best available evidence shows no broad coasting effect. A 3,646-bout UFC study found no detectable drop across 11 activity measures for leaders. Kansas data showed leaders winning final rounds more often with open scores.

Does open scoring prevent bad decisions?

No. Open scoring reveals judges' cards earlier but does not change or overturn them. It can alert a fighter that the officials see the bout differently, giving that fighter time to adjust before the last bell.

Why is the MMA open-scoring evidence still limited?

The largest study uses clear score certainty as a proxy because the UFC did not reveal cards. Real open-scoring data comes from a small, voluntary set of events, and the UFC study excludes every five-round bout.