Why Do UFC Fighters Get Staph Infections? The Evidence

Quick answer

UFC fighters get staph infections because close contact, damaged skin and shared equipment create routes for bacteria to spread. Dirty mats can contribute, but they aren't the whole explanation: people can carry Staphylococcus aureus without feeling ill. Studies in contact athletes and Brazilian jiu-jitsu show a real skin-health problem, yet they don't establish a UFC infection rate. Islam Makhachev's withdrawal and Dustin Poirier's hospital treatment show the possible disruption. Neither case tells you how often infections happen or how much they change winning chances.

Data snapshot: A 2019 Italian study tested 238 contact-sport athletes; a 2017 Brazilian jiu-jitsu study surveyed 140 participants about the previous year. These measure bacterial carriage and reported training conditions, respectively, not UFC-wide infections. Clinical context comes from the Association of Ringside Physicians' 2024 statement and CDC guidance updated in June 2025.

Why does staph spread in MMA gyms?

MMA combines several transmission routes that the CDC identifies as risks in athletic settings: repeated skin contact, cuts, abrasions and shared items.

Grappling means direct contact with another person's skin, where scrapes can give bacteria an entry point. Shared surfaces and personal items offer other routes. Cleaning the mats addresses part of that chain, but it doesn't replace checking wounds or keeping infected athletes out of contact training.

That distinction changes how you judge a gym: spotless-looking mats don't tell you whether someone is training through an untreated infection. Nor does one infection prove the cleaning staff caused it.

The useful question is whether the gym interrupts transmission at each step. Look at wound reporting, access to showers, equipment cleaning and decisions about who can train.

Is carrying staph the same as having an infection?

No: carriage, also called colonization, means bacteria are present without necessarily causing illness, while an infection means they are causing disease.

MRSA is a form of Staphylococcus aureus resistant to several antibiotics. It isn't a synonym for every staph infection, and resistance doesn't mean no treatment works.

Valentina Mascaro and colleagues tested 238 Italian contact-sport athletes; their 2019 paper found S. aureus carriage in 101 athletes, or 42.4%. MRSA carriage was 1.3% of the full sample.

Those findings answer a narrow question: what did the researchers detect when they sampled these athletes? They don't mean 42.4% had infected wounds, nor do they mean 42.4% of UFC fighters have staph.

Keep the denominator attached: percentages of all athletes and percentages of bacterial isolates describe different things, even within the same paper.

What do the most useful studies actually measure?

The strongest comparison here is between different measurements, rather than a league table of supposedly dirty sports.

Alex McDonald and colleagues asked about BJJ training problems, with a skin-infection category covering medically diagnosed conditions reported by participants. The survey excluded competition and conditioning injuries.

You can't merge these rows into one rate: the Italian researchers looked for bacteria, while the BJJ researchers collected recalled health events. Their populations, time windows and outcomes differ.

The BJJ result still matters because skin infections belong in a discussion of training availability alongside joint injuries. But replacing the broad label with “staph” would invent a diagnosis the survey doesn't provide.

Neither study follows a representative UFC roster through a season. That missing design is why a precise answer to “how common is staph in UFC?” remains unavailable here.

What do Makhachev and Poirier's cases tell us?

They show disruption through different kinds of evidence, but they don't provide a usable infection-versus-win-rate study.

In November 2020, Islam Makhachev withdrew from his scheduled fight with Rafael dos Anjos. MMA Mania reproduced his statement describing an infection and other cases within his team.

In December 2022, Dustin Poirier required hospital care and surgery for a reported staph infection in his foot. LowKick MMA reported his wife Jolie's account of an abscess requiring drainage.

These are historical episodes, not claims that either fighter currently has an infection.

Makhachev's account documents a lost booking, while Poirier's case shows that a reported skin infection can require treatment beyond routine wound care. Neither report identifies every exposure or supplies a comparison group.

Counting only athletes who compete while ill creates another trap: withdrawals disappear from the fight-results sample. The most disrupted fighters may never enter your dataset.

A collection of post-fight explanations has the opposite problem: reporting may depend on the outcome. Without consistent screening, you can't separate health effects from who chooses to discuss them.

Can you diagnose staph from a fighter's photo?

No reliable diagnosis comes from a screenshot alone. The CDC says appearance cannot identify whether a skin infection is MRSA; laboratory testing is needed to establish that cause.

Redness, warmth, swelling, pain and drainage can prompt concern without revealing the organism, treatment status or whether contact participation is safe.

Treat a visible mark as a reason for assessment, not a confirmed medical report. A fighter's account is stronger evidence of reported illness than anonymous image analysis, though it still isn't a laboratory result.

For fight analysis, keep those evidence levels separate by recording who supplied the information and when. Don't quietly upgrade “suspected infection” into “confirmed MRSA” as the story spreads.

Does staph change a UFC prediction?

Confirmed illness can change what you know about preparation, but these sources don't support a fixed percentage penalty to a fighter's win probability.

You would need consistent diagnoses, timing, severity, missed training and treatment information, while also accounting for opponent strength and withdrawals. Public reports rarely provide that whole record.

If you're keeping prediction records, mark uncertainty before the fight instead of adding a medical explanation only after your pick loses. The same standard should apply to Makhachev, Poirier and an unknown prelim fighter.

Missing information isn't a betting edge; sometimes it is simply a reason to have less confidence in your assessment.

Can fighters train with staph if they cover it?

Covering an untreated bacterial infection doesn't make contact training acceptable. The Association of Ringside Physicians recommends separating suspected cases from training partners and obtaining medical assessment.

Its return criteria include at least 72 hours of directed antibiotic therapy and no new lesions for at least 48 hours. They also require no drainage and no systemic symptoms, such as fever or malaise.

Those conditions work together rather than providing automatic clearance when a clock runs out. Nor are they instructions to stop prescribed treatment after 72 hours.

Your clinician should guide treatment and return to contact, while competition clearance also depends on the applicable medical requirements. A dressing protects a wound; it doesn't replace that decision.

What prevention steps have credible backing?

CDC athlete guidance centers on habits you can repeat: shower promptly after exercise, clean your hands and avoid sharing towels or razors. Wash training clothing after use and dry it fully according to care instructions.

For gyms, the CDC recommends cleaning shared equipment after each use and letting it dry. Products need the contact time stated on their labels. Damaged surfaces that can't be cleaned properly need repair or replacement.

Don't put surface disinfectants on your skin: they're cleaning products, not wound treatments.

If you suspect an infection, stop contact training and seek prompt medical care. Don't squeeze or pick the lesion, and seek more urgent medical assessment for fever or worsening symptoms.

A useful gym policy makes reporting easy, so athletes know whom to tell and what clearance is needed to return. That is more actionable than blaming a teammate after an outbreak.

How solid is this data?

The biology and prevention guidance are clearer than the UFC numbers. The ARP statement says comparative infection-incidence data for professional and amateur combat athletes are unavailable.

The Italian study is a snapshot from a specific sporting population, while the BJJ survey relies on volunteer responses and recall. Neither samples the UFC roster, and the survey's skin-infection category isn't staph-specific.

News reports add recognizable cases, but publicity creates selection bias because serious episodes attract coverage while uneventful training does not. Differences in medical access and reporting also complicate comparisons across gyms and eras.

This article combines published evidence and named case reports without adding a new AgentMMA infection audit. A better study would follow athletes over time, record confirmed diagnoses and count training exposure, including missed sessions.

FAQ

Why do UFC fighters get staph infections?

Close skin contact, abrasions and shared equipment allow bacteria to spread in MMA training. People can carry staph without symptoms, so dirty mats are one possible route, not a complete explanation for every infection.

Is staph the same as MRSA?

No: MRSA is a type of staph resistant to several antibiotics, and other staph infections aren't MRSA. A photograph can't distinguish them; laboratory testing establishes whether MRSA caused an infection.

How common are staph infections in the UFC?

The sources reviewed here don't establish a UFC-wide rate. Studies of bacterial carriage, BJJ skin infections and individual fighters measure different things. None provides a representative count of confirmed UFC staph infections.

Can you train BJJ with a covered staph infection?

You shouldn't use a bandage to keep training with an untreated bacterial infection. Seek medical assessment and follow treatment and return-to-contact guidance, because clearance depends on clinical recovery, not merely hiding the lesion.

Does a staph infection mean a fighter will lose?

No: illness can disrupt preparation, but these sources don't quantify a reliable change in UFC winning chances. Reported cases lack consistent screening, severity data and comparable healthy opponents, while withdrawals also distort any results-only sample.