Former UFC heavyweight and Brazilian Jiu-Jitsu black belt Brendan Schaub has delivered a harsh assessment of Mikey Musumeci’s planned transition to MMA, arguing that even one of the greatest submission grapplers in the world could face serious problems against experienced UFC flyweights.

Mikey Musumeci has spent years establishing himself as one of the most technically accomplished Brazilian Jiu-Jitsu competitors of his generation.

The multiple-time world champion is famous for his extraordinary flexibility, intricate guard work, leg-lock attacks and ability to submit elite opponents.

However, as Musumeci prepares to transition into mixed martial arts, former UFC heavyweight Brendan Schaub is questioning whether those skills will be enough inside the Octagon.

Reacting to reports that Musumeci could make his MMA debut before the end of 2026, potentially at 125 pounds, Schaub argued that entering the UFC without previous professional MMA experience would be a serious mistake.

His assessment was particularly harsh.

“He’d get eaten alive,” Schaub declared.

But his criticism raises a much bigger question for the Brazilian Jiu-Jitsu community:

Can a world-class sport Jiu-Jitsu specialist successfully transition into modern MMA without first developing high-level wrestling and striking?

Schaub: “He’d Get Eaten Alive”

During his commentary, Schaub reacted to the possibility of Musumeci competing in the UFC flyweight division.

The former heavyweight questioned why an athlete without professional MMA experience would consider entering one of the organization’s most technically demanding weight classes.

Schaub argued that the modern 125-pound division is filled with athletes who have spent years combining wrestling, striking, submission grappling and cage control.

He described the idea of making an immediate UFC debut as particularly risky.

“Go ahead and do it if you want a short-lived career,” Schaub said.

He continued by arguing that even Musumeci’s achievements as a multiple-time BJJ world champion would not guarantee success under MMA rules.

Schaub also described the prospect of entering the UFC directly from competitive Jiu-Jitsu as a “slap in the face to the real UFC athletes.”

His central argument was simple: being one of the world’s best grapplers does not automatically make someone a complete mixed martial artist.

He even mocked the possibility of Musumeci relying on his familiar guard-based approach:

“Go ahead and butt scoot in MMA. Let me know how it goes for you.”

For Schaub, the difference between elite submission grappling and elite MMA is too significant to ignore.

Why Musumeci’s BJJ Game Could Face Challenges in MMA

Musumeci’s competitive Jiu-Jitsu game is built around technical precision, flexibility, positional control and sophisticated submission sequences.

He is particularly dangerous when attacking from guard, where he can create opportunities for leg locks, back takes and other submissions.

In sport BJJ, however, competitors operate under rules that eliminate one of the biggest threats in combat sports: strikes.

An athlete playing guard in a Jiu-Jitsu competition can concentrate entirely on controlling distance, establishing grips and attacking submissions.

In MMA, that same athlete must also defend punches, elbows and ground-and-pound.

This changes the dynamics considerably.

A position that is relatively safe in sport BJJ can become dangerous when the opponent is allowed to strike.

For example, an MMA fighter defending a leg-lock attack may have opportunities to deliver punches while attempting to escape.

Likewise, an opponent trapped inside closed guard can potentially create posture and strike from the top.

This does not mean that guard-based Jiu-Jitsu is ineffective in MMA. Rather, it requires modifications to account for striking.

The ability to control an opponent’s posture, prevent punches and transition between defensive and offensive positions becomes essential.

Musumeci’s exceptional technical knowledge could provide a strong foundation, but his MMA development must account for these additional threats.

The Wrestling Question: Can Musumeci Get the Fight to the Ground?

Another major consideration is wrestling.

Musumeci has historically been known primarily for his guard work and submission attacks rather than for building his competitive identity around takedowns.

That distinction matters considerably in MMA.

A fighter can possess world-class submission skills, but those skills become difficult to apply against an opponent who refuses to engage on the ground.

Modern UFC fighters frequently combine takedown defense, cage wrestling and striking to dictate where a fight takes place.

An opponent who successfully defends takedowns can force a submission specialist to spend extended periods exchanging strikes.

For Musumeci, developing reliable ways to bring opponents to the ground will therefore be particularly important.

That could include:

• Wrestling entries and takedown combinations.

• Clinch work against the cage.

• Trips and body-lock takedowns.

• Using striking to create wrestling opportunities.

• Maintaining top control once a takedown is completed.

The question is not whether Musumeci understands grappling. His achievements have already established that.

The question is how effectively he can impose his grappling against an opponent who is actively trying to keep the fight standing.

Musumeci Is Already Working on His MMA Skills

Importantly, Musumeci himself has acknowledged that transitioning into MMA requires considerable preparation.

In a September 29 interview with Ariel Helwani, Musumeci discussed his ambition to compete in the UFC flyweight division and eventually challenge for the championship.

However, he also recognized that he has significant work ahead of him.

“I have a lot of work to do before then,” Musumeci said.

He specifically discussed improving his striking and learning how to bring opponents to the ground without being knocked out.

According to a September 30 report from Sherdog, Musumeci has been training at Syndicate MMA in Las Vegas and is working toward his professional MMA debut.

He also revealed that he had discussed potential fights with multiple promotions.

His long-term ambition is to compete in the UFC at 125 pounds, but he has not presented himself as a finished MMA fighter.

That distinction is important when evaluating Schaub’s criticism.

Musumeci is not claiming that his existing sport BJJ game alone will automatically make him successful in the UFC. He has publicly acknowledged the need to develop the other elements of MMA.

Other BJJ World Champions Who Successfully Transitioned to MMA

History offers several examples of elite grapplers who successfully moved into mixed martial arts.

However, their careers also demonstrate the importance of adapting their Jiu-Jitsu to the demands of MMA.

Demian Maia

Former ADCC champion and BJJ world champion Demian Maia became one of the most successful submission specialists in UFC history.

Maia developed an MMA approach built around takedowns, back control and relentless positional pressure.

Rather than relying exclusively on his guard, he learned how to force opponents into grappling exchanges.

His UFC career included submission victories over high-level opponents and championship challenges against Anderson Silva and Tyron Woodley.

His career demonstrated that an elite grappler could compete successfully in modern MMA while maintaining a predominantly Jiu-Jitsu-based approach.

However, Maia had accumulated professional MMA experience before entering the UFC in 2007.

Mackenzie Dern

Another example is Mackenzie Dern, a former BJJ world champion who transitioned into professional MMA.

Dern brought exceptional submission skills into the UFC, where she has demonstrated her ability to finish opponents on the ground.

However, her transition also highlighted the difficulties that grappling specialists can encounter when opponents successfully defend takedowns or maintain distance on the feet.

Dern began her professional MMA career before joining the UFC in 2018, gradually gaining experience under the new ruleset.

She has since developed her striking and wrestling while continuing to rely on her submission expertise.

These examples demonstrate that elite Jiu-Jitsu can be a powerful foundation for MMA, but success requires adapting techniques, developing additional skills and accumulating experience.

Brendan Schaub Is Also a BJJ Black Belt

Schaub’s criticism comes from someone with experience in both mixed martial arts and Brazilian Jiu-Jitsu.

The former UFC heavyweight competed professionally in MMA from 2008 to 2014 and subsequently became a prominent combat sports commentator and podcast host.

He also continued training Brazilian Jiu-Jitsu after retiring from MMA, receiving his black belt in 2021.

Interestingly, Schaub himself was involved in one of the most talked-about crossover grappling matches of the past decade.

At Metamoris 2 in 2013, Schaub faced BJJ world champion Roberto “Cyborg” Abreu.

The match became controversial because Schaub repeatedly disengaged and avoided extended grappling exchanges.

The performance eventually became known in the BJJ community as the Schaub Shutdown.

Years later, Schaub defended his approach and argued that the dynamics would have been completely different had Cyborg faced him under MMA rules.

His criticism of Musumeci reflects a similar distinction between the two sports: the rules determine which techniques, tactics and physical attributes are most effective.

But Can Someone as Technically Gifted as Musumeci Surprise Everyone?

There is another side to the debate.

Musumeci is not an ordinary Brazilian Jiu-Jitsu competitor.

He has spent years competing against elite grapplers and developing an exceptionally sophisticated submission game.

His ability to attack the legs, transition between positions and recognize submission opportunities could potentially present unusual problems for MMA opponents.

His recent grappling victory over UFC veteran Bryce Mitchell at UFC BJJ 11 also demonstrated his ability to compete against an experienced MMA fighter under submission-grappling rules.

Musumeci won the September 24 contest by unanimous decision, although the bout did not involve strikes and therefore cannot establish how he would perform in an actual MMA fight.

The key question is whether Musumeci can develop the wrestling, striking defense and cage awareness necessary to make his existing Jiu-Jitsu effective under MMA rules.

His ability to adapt could be just as important as his existing technical achievements.

Is Schaub Underestimating Elite Jiu-Jitsu?

Schaub’s comments have reopened a longstanding debate within the grappling community.

How much of a world-class sport BJJ game translates directly into MMA?

The examples of Demian Maia and Mackenzie Dern demonstrate that elite grappling can form the foundation of a successful MMA career.

At the same time, both athletes needed to develop their skills beyond traditional sport Jiu-Jitsu.

For Musumeci, the challenge will be learning to combine his exceptional submission game with the realities of professional MMA.

Schaub believes that entering the UFC without sufficient experience would expose him to significant risks.

Musumeci, meanwhile, has expressed confidence in his long-term potential while acknowledging that he still has considerable work ahead of him.

Whether Musumeci eventually succeeds in MMA remains an open question, but his transition is already generating considerable discussion across both the BJJ and MMA communities.

What do you think? Is Brendan Schaub making a valid point about the dangers of transitioning directly from sport BJJ into the UFC, or could Mikey Musumeci’s exceptional grappling ability allow him to surprise experienced MMA fighters?

Let us know your thoughts in the comments.