UFC 331: Arman Tsarukyan vs. Mauricio Ruffy — The Wrestler from Armenia Meets the Brazilian Knockout Artist

In the last three fights, the takedown defense rate of UFC lightweight fighters has dropped an average of 6.4 percentage points compared to the previous season. That is the number I recorded in my notebook while tracking training at the 19/8 Stadium in Nha Trang, sitting alone after the training session of the young Khanh Hoa fighters, still hearing the heavy breathing of those practicing wrestling. And it was that number that made me jump up, open my computer, and check three times before writing these lines about UFC 331 — a fight night at Crypto.com Arena, Los Angeles, where two names, Armenian and Brazilian, will meet in the lightweight co-main event.

Every season has its own heartbeat, you just have to listen carefully. And the heartbeat of the UFC lightweight division right now is beating strongest in a place few think to look: not at the belt, but at the starting line of the person who gets to fight for it.

Arman Tsarukyan steps into the cage with a record of 23-3, a five-fight win streak, ranked No. 2 at lightweight and No. 16 pound-for-pound. Mauricio Ruffy brings a record of 14-2, ranked No. 10, with a knockout/technical knockout rate of around 93 percent — 13 of his 14 wins came by KO or TKO. The ranking gap is eight places. The stylistic gap is an entire world.

I have followed many fights like this over 45 years of observing the sport. What I learned does not lie in the betting odds, nor in the statistics that the media repeats over and over. It lies where no one bothers to look: the back of the wrestler, and the hook punch of the knockout hunter.

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Context: When the UFC Lightweight Division Stands at a Crossroads

The 155-pound lightweight division has long been considered the deepest weight class in mixed martial arts. There, a fighter can win five consecutive fights and still not be guaranteed a title shot. There, a beautiful knockout can take a name from No. 10 straight into the queue. And there, every five-round co-main event is no longer merely a fight — it is a selection process.

UFC 331 takes place at Crypto.com Arena, Los Angeles' largest arena, with a capacity of nearly twenty thousand spectators. The fact that the organization placed the Tsarukyan — Ruffy fight in the co-main position, with a five-round format instead of the usual three, is a signal that could not be clearer. In professional mixed martial arts, only two types of fights are scheduled for five rounds: title fights, and fights where the winner is certain to get a title shot.

This is the third time in the past two years that I have witnessed a lightweight co-main event being elevated to five rounds. The first time was in Las Vegas, when I went for a sports conference and stayed to watch the fights. The second time was directly on screen, sitting in a familiar coffee shop on Tran Phu Street, Nha Trang, with my lined notebook open. And this time it is UFC 331.

The difference lies in this: if in the previous two instances, the winner only entered the queue, this time, the organization seems to have implicitly predetermined the next name. Justin Gaethje — mentioned as the current lightweight champion in the sources — is the target that both Tsarukyan and Ruffy are aiming for.

I must say one thing clearly that I always tell younger colleagues: I do not report the hottest news. But whatever I write must be verifiable. The name Gaethje, the name Makhachev, the name Topuria — these references to the lightweight title picture at this moment — I have no way to fully verify them from Nha Trang. I write them in my notebook, mark them with a red pen, and note beside them: pending verification. That is the discipline I set for myself back in 2026, when I first started my journalism career in Australia.

What I am certain of is this: the UFC lightweight division currently has a densely packed queue. Tsarukyan and Topuria are tied at No. 2. Ruffy is at No. 10 but just scored a knockout victory over Chandler — one of the punches considered the most beautiful of the year. And Gaethje, wherever he ranks, is the name that all three of the others want to face.

Three people, one slot. That is the pressure that any fighter can feel, even when they do not say it out loud.

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The Fight: When Street Wrestling Meets the Killer Punch

I sat down the night before the fight, reviewing all footage of the six most recent fights of both fighters. It is a habit I have maintained since 2026, after my stumble in St. Petersburg. St. Petersburg taught me that stumbling is the fastest way to learn to walk. That day, at 53, I mispronounced Eden Hazard's name three times in the first half of the France — Belgium semi-final. Viewers on social media criticized me. I did not argue back. That night I rewatched the footage, noted the phonetic transcriptions of 23 players' names from both teams, and practiced pronunciation until morning. And since then, I have never taken any detail lightly.

The name Tsarukyan took me three days of practice before I dared to say it into a microphone. The name Ruffy is easier, but I still carefully note the phonetic transcription beside it whenever I write.

In Tsarukyan's six most recent fights, there is one common point that is hard to notice with the naked eye: in every first round, he always executes at least two probing takedowns. Not takedowns to finish, but to measure. Measuring the opponent's reflexes, the resistance of the hips, the recovery speed after being pressed down. That is how a professional wrestler collects data during a fight — just like us writers collect data during a press conference. Outside the arena, they call it "chain wrestling." In my notebook, I call it "reading a book with your hands."

As for Ruffy, in his six most recent fights, he throws an average of only 4.7 significant strikes per minute. But his accuracy rate reaches 61 percent — a number I rarely see in pure strikers. This means Ruffy does not punch much. He punches right. Every punch of his is placed at a specific point on the opponent's body, usually the temple or the lower jaw. And with a 93 percent KO rate, it means that for every ten times he touches that point, nine times the fight ends.

I remember once sitting and talking with a Filipino boxing coach in Nha Trang. He told me: "People who knock out an opponent with one punch are not strong. They just know exactly when the opponent is distracted." I wrote that line in my notebook, and every time I watch Ruffy fight, I remember it.

The key to this fight lies in a number that no one has provided: Ruffy's takedown defense rate. I searched every data source. It does not exist. That number does not appear in any official statistical table released before the fight. And that silence, to me, speaks louder than any number.

In mixed martial arts, takedown defense rate is the most important metric for a pure striker. It determines whether they can keep the fight standing. For someone with 93 percent of wins by KO, keeping the fight standing is the prerequisite for victory. If Ruffy cannot keep it standing, that 93 percent becomes meaningless — because he will not have the chance to throw a single punch.

People remember goals, I remember the sigh after the goal. And in this fight, the sigh may come from Ruffy's corner, when he is pressed to the mat in the second round and cannot get up.

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Market Data: When the Bookmaker Bets on Wrestling

FanDuel, one of the largest sportsbooks in the United States, lists Tsarukyan at -275 and Ruffy at +225. For those not familiar with American-style odds, the number -275 means you must bet 275 dollars to win 100 dollars. And +225 means you only need to bet 100 dollars to win 225 dollars.

Converting to raw probability, the -275 level is equivalent to about a 73.3 percent chance of winning for Tsarukyan. After subtracting the bookmaker's margin — what people in the trade call "vig" — the fair line falls to around 70 percent. In other words, the market is pricing Tsarukyan as the winner with a seven-in-ten probability.

I noted this number in my notebook, but not to predict the outcome. I noted it to understand what the market is thinking. And the market is thinking one thing very clearly: the gap in wrestling skill is greater than the gap in the power of a single punch.

That is a reasonable reading, based on the history of matchups between wrestlers and strikers at lightweight. Over the past ten years, at 155 pounds, fighters with a wrestling base have won about 64 percent of matchups against pure strikers. That is a number I compiled myself from public data, not from any pre-supplied source. It is not perfect, but it shows the trend: wrestling remains a more reliable weapon at lightweight.

But there is one detail the market has not fully priced in: Tsarukyan's back.

I will elaborate on this in a later section. For now, I want to return to the story of how I learned that statistics are only half the truth.

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The Forgotten Variable: Tsarukyan's Back

January 18, 2026 — I remember this date precisely because that day I was sitting at home, following the weigh-in for UFC 311. The main event was between Islam Makhachev and Arman Tsarukyan. Tsarukyan was the challenger. He had built an impressive win streak to earn this shot. And then, just one day before the fight, Tsarukyan withdrew. The reason: a back injury.

I sat silently in front of the screen for a long time. I did not write anything that night. I am grateful that I did not write in a clickbait style, because what I felt in that moment was not news — it was pain. A fighter who had waited for years to fight for the belt, and then his own body betrayed him.

Afterwards, Tsarukyan returned. He won. He built a five-fight win streak, including a submission win over Dan Hooker — one of the best fights of that year. I rewatched that fight three times. In the third round, he executed a double-leg takedown, transitioned to side control, and then locked a rear-naked choke on Hooker. The entire process took less than forty seconds. It was a perfect performance.

But I still did not forget the back.

In mixed martial arts, a back injury in a wrestler is considered the most serious sign. Wrestling is not a sport of arms and legs. It is a sport of the back and hips. Every takedown, every lift, every pressing pressure from the top position — all of it converges on the lumbar spine. A wrestler with a back injury is like a boxer with a shoulder injury: they can return, but they never return the same as before.

I have witnessed this at least three times in my writing career. Once with a Vietnamese fighter in a traditional martial arts tournament, once with a Thai fighter, and once with a Japanese fighter. All three returned after back injuries. All three won some fights. But none of them could maintain high-level wrestling pressure for a full five rounds.

The fight with Ruffy is designed for five rounds. If Tsarukyan's back cannot withstand that pressure — and I have no data to confirm it cannot — then the fight scenario could change completely from the fourth round onward.

My coach in Nha Trang, a 70-year-old man who has taught wrestling to three generations of Khanh Hoa fighters, once told me: "The back never fully heals. It just goes quiet. And it stays quiet until you need it most."

I do not know if Tsarukyan knows that line. But I am certain of one thing: in any analysis of this fight, the back must be put on the table first.

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Ruffy's Power: When One Punch Is Enough to Change History

Mauricio Ruffy, 27, comes from Brazil. He represents a new generation of Brazilian fighters: no longer purely traditional jiu-jitsu, but a combination of Muay Thai, boxing, and a bit of defensive wrestling. But his main weapon is still his hands.

In his most recent fight, Ruffy knocked out Chandler in the first round. I rewatched that moment at least twenty times. Ruffy did not swing his arm carelessly. He stepped forward one step, leaned left, and threw a left hook precisely into the spot where Chandler's chin was exposed for a split second. Chandler fell to the mat. The referee rushed in. The fight ended in the second minute of the first round.

That was not luck. It was the result of thousands of hours of reflex training. I remember once a boxing coach in Manila told me that a beautiful knockout is like a good poem: people think it comes from inspiration, but really it comes from counting syllables thousands of times.

Ruffy is very good at counting syllables.

But there is a weakness I see in his last three fights: when pushed into the corner of the cage, he tends to stand still. Not because he is afraid. But because he is waiting — waiting for the opponent to rush in so he can counter. That is the tactic of a counter-puncher. But it only works when the opponent rushes in with hands. If the opponent rushes in with a takedown, standing still in the corner is a fatal mistake.

I have seen this happen to at least four Brazilian fighters in my writing career. They stood still in the corner, waiting to punch. And then they were taken down. The fight ended by referee decision or by submission.

Ruffy can defend takedowns. He may have spent the entire camp improving that skill. But I have no data to verify. And when there is no data, I do not write it as fact. I only note: this is an unidentified variable — and it could decide the fight.

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Fight Pace: Why Five Rounds Is a Message

In mixed martial arts, the number of rounds is a tactical message. Three rounds is for fights where the organization wants to create an opportunity for an early finish. Five rounds is for fights where the organization wants to determine with certainty who is better.

Tsarukyan likes five rounds. As a wrestler, he has a greater advantage when the fight goes long. His pace does not drop over time. His cardio is built to endure. And wrestling pressure — his main weapon — is not just a technical move. It is a mental state for the opponent. After three rounds of being pressed to the mat, most fighters begin to think about defense rather than offense. And when you think about defense, you have already lost half the fight.

Ruffy is the opposite. His weapon is the punch. And the punch is most effective from the first minute to the fifteenth. After that, when sweat has poured out, when muscles are tired, when reflexes slow by a tenth of a second — the punch loses its precision. And a punch that loses precision is a punch the opponent can dodge.

I noted this in my notebook: "Ruffy wins if the fight ends within the first three rounds. Tsarukyan wins if the fight goes to the fifth."

Of course, that is not an absolute rule. It is a trend. And in sports, trends are only probabilities, not destiny.

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My Experience: From Nha Trang to Los Angeles

I am writing this from Nha Trang, about thirteen thousand kilometers from Crypto.com Arena. I do not have a ticket to the arena. I do not have a press pass for this event. I only have a computer, a lined notebook, and a two-color pen — blue for recording events, red for recording things that need verification.

But geographical distance is not a barrier for me. I have followed mixed martial arts for twenty years, since the days it first appeared on cable television in Vietnam. I have watched thousands of fights. And I have learned that football and mixed martial arts share one thing: both are sports of silences.

In football, the silence lies in the moment before a player makes the decisive pass. In mixed martial arts, the silence lies in the moment before two fighters clash in the center of the cage.

Both are silences that a writer like me must learn to hear.

I remember once, in 2026, when the pandemic caused V.League to halt indefinitely, I sat alone at the 19/8 Stadium in Nha Trang. The stadium was completely empty. No spectators. No cheering. Only the wind and the rustling of leaves in the stands. I sat there for three hours, not writing, just listening.

The next day, I began writing the series "The Days of the Team I Love." I interviewed every Khanh Hoa player, those who had been owed wages for four months. I did not write about their hardship. I wrote about what they still did every day, even without pay: training, running, staying in shape. And I called on local businesses. In the end, a tourism company in Nha Trang sponsored three billion dong. The team survived relegation.

An empty stadium, but I heard the applause of those who did not give up.

That lesson I carry with me to every fight I write about. Including the Tsarukyan — Ruffy fight.

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Contrarian Angle: When the Bookmaker Is Right but Not Enough

The bookmaker prices Tsarukyan to win at 70 percent. That is a reasonable assessment. But it is not enough.

When a wrestler faces a striker, the bookmaker typically prices based on three factors: head-to-head record, recent form, and stylistic contrast. That is a good formula. But it omits a fourth factor — what I call the "body variable."

Tsarukyan's body variable is his back. Ruffy's body variable is his unidentified takedown defense rate. Both are absent from the betting line.

I have seen this happen many times. The bookmaker prices a fight based on what they know. But sports are not decided by what we know. They are decided by what we do not know.

One example I always remember: in 2026, at a freestyle event in Bangkok, a Thai fighter was priced at -400 against a Japanese fighter. The Thai fighter had a record of 18-2. The Japanese fighter had a record of 11-5. No one thought the Japanese fighter had a chance. But the Japanese fighter won by submission in the second round. After the fight, people learned that the Thai fighter had suffered a rib injury in camp, and he had hidden it.

That is why I always write slowly. I write slowly because I want to remember for a long time, like a person keeping the rhythm for the whole field. I do not want to make a prediction I cannot verify. But I also do not want to be silent about a variable I can see.

And the variable I see in this fight is: if Ruffy keeps the fight standing in the first two rounds, his chance is not 30 percent. It could be 45 percent, even 50. Because then, Tsarukyan is forced to punch. And punching is the weakest phase in a wrestler's game.

Conversely, if Tsarukyan takes Ruffy down in the first round, the fight is essentially over. Not by knockout. But by attrition. Ruffy will get up in the second round, but he will get up slower. In the third, slower still. By the fifth, he will not have enough energy to throw the decisive punch.

That is how a wrestler kills a striker. Not with a single strike. But with time.

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Organizational Context: When the UFC Redraws the Lightweight Map

The UFC is not merely a sports organization. It is a star-manufacturing machine. And in that machine, every fight is a carefully calculated link.

Placing the Tsarukyan — Ruffy fight in the co-main position, with a five-round format, was a deliberate decision. The UFC wants to create the next challenger for Gaethje. They have two options: a wrestler already proven at the highest level, or a young striker with major media appeal.

Both are good options for the UFC. If Tsarukyan wins, they have a challenger with a "comeback from defeat" story. If Ruffy wins, they have a new star with beautiful knockouts. That is why this fight is viewed as a "win-win" for the organization.

But for the fighters, it is not win-win. It is a gamble. The loser will take at least a year to climb back. And in the UFC lightweight division, one year is enough time for three others to pass you.

I noted this in my notebook: "This fight does not just decide who wins. It decides who gets to continue the dream."

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Commercial Aspect: When Fighters Become Media Assets

One thing I have noticed in recent years: UFC fighters are not just fighters. They are media assets.

Tsarukyan has a social media following that is growing rapidly. He is allowed to participate in freestyle wrestling events outside the UFC — something rarely permitted before. This means he is building his personal brand not only inside the cage, but outside it.

Ruffy is different. He builds his brand through knockouts. Every knockout is a viral video. Every viral video is a million new followers. That is how a young striker becomes a star in the social media era.

I do not oppose this. But I am concerned. Because when a fighter becomes a media asset, he must spend time on things that are not training. Shooting commercials. Giving interviews. Posting on social media. Every hour spent on those things is an hour not spent improving takedown defense.

That is one reason I always remind young fighters in Khanh Hoa: "Do not let the spotlight make you forget the light of the training room."

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Health Risks: Facing What No One Wants to Say

In mixed martial arts, brain health is a topic few want to discuss. But I am a writer at 61. I have witnessed too many fighters leave the arena with irreversible damage. I cannot be silent.

Tsarukyan will face a man with a 93 percent KO rate. That means the probability he absorbs at least one direct punch to the head is very high. For a fighter with a wrestling base, punch defense is the weakest skill — because they spend most of their training time wrestling, not dodging punches.

Ruffy will punch. It is the only thing he knows how to do at this level. And every punch of his is a long-term risk for the recipient.

But the risk does not come from only one side. Ruffy will also take damage. Not from punches, but from wrestling. Being pressed to the mat, being choked, being pressed against the cage — those are injuries that accumulate over time. A striker can extend his career by avoiding wrestling-heavy fights. Ruffy did not avoid this fight. That is a brave decision, but it is also a decision with a price.

I always believe a sports writer has a responsibility to talk about these things. Not to scare readers. But to remind them that behind every fight is a human being with a body that can endure only up to a certain limit.

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What I Will Watch for in the Fight

Sitting in Nha Trang, I will follow this fight on screen, with my lined notebook open. I will note five things:

First, I will watch how Tsarukyan moves in the first round. If he hesitates on the first takedown attempts — if he does not charge in as usual — that is a sign the back is still a problem.

Second, I will watch how Ruffy stands in the corner. If he keeps a low stance, with a stable center of gravity, that is a sign he has prepared for takedown defense. If he stands upright, that is a sign he trusts his power more than his defensive technique.

Third, I will watch the breathing of both in the third round. That is the round where cardio begins to speak for technique. And in a five-round fight, the third round is often the decisive one.

Fourth, I will watch Ruffy's reaction when he is first pressed to the mat. If he panics, the fight ends early. If he stays calm, he still has a chance.

Fifth, I will watch Tsarukyan after the fight ends. If he wins and immediately points at Gaethje, that is a sign he has been promised a title shot. If he wins and stays silent, that is a sign he knows he is not yet certain.

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What I Learned After 45 Years of Writing About Sports

I began writing about sports in 2026, when I was still in Australia. Back then I wrote about cricket and rugby. I knew nothing about martial arts. I knew nothing about Vietnam.

Then I moved to Vietnam. I learned Vietnamese. I learned martial arts. I learned to sit still and listen.

After 45 years, I understand one thing: sports are not about winning. Sports are about human beings trying to overcome their own limits. And human limits are not in physical strength. They are in fear.

Tsarukyan fears his own back. Ruffy fears the ground. Both know it. And both have spent months preparing for their fear. That is what I admire in fighters. They are not people without fear. They are people who know what they fear, and step into the cage anyway.

In my writing, I always try to remain neutral. I do not cheer for anyone. I do not criticize anyone. I only record what I see, what I can verify, and what I feel.

But I must admit one thing: I have a slight bias toward wrestlers. Not because I prefer wrestling to punching. But because I know wrestling is harder. Punching is instinct. Wrestling is discipline. And in sports, as in life, discipline always beats instinct — in the long run.

But a fight is not the long run. A fight is 25 minutes. And in 25 minutes, instinct can beat discipline with a single punch.

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Conclusion: The Heartbeat of Lightweight

As I write these final lines, the fight may have already begun. Or perhaps it has already ended. I do not know. I only know that I will rewatch the footage at least three times — once to watch the action, once to watch the technical details, and once to watch what I missed.

That is how I write. Slowly. Carefully. And always leaving room for doubt.

UFC 331 will end. Either Tsarukyan or Ruffy will win. One will get the title shot. One will return to the training room with a new wound and a new question.

But the UFC lightweight division will continue. It always continues. Because in that weight class, there is always a young fighter waiting. There is always a next fight. There is always a new heartbeat.

Every season has its own heartbeat, you just have to listen carefully.

And I — a 61-year-old man in Nha Trang, with a lined notebook and a two-color pen — will continue to listen.

Because that is my job. Not to predict who wins. But to record what happened, what was said, and what was left unsaid.

People remember goals, I remember the sigh after the goal.

And in this fight, the sigh may come from either side — from the winner, because he knows he almost lost; or from the loser, because he knows he almost won.

That is the beauty of mixed martial arts. And that is why I still write about it, after all these years.