Tom DeBlass

Born on May 14, 1982, in New Brunswick, New Jersey, Tom DeBlass displayed an early affinity for martial arts that would ultimately define the trajectory of his life. He began training taekwondo at age 5, progressing through the ranks to earn a red belt before his athletic focus shifted during his teenage years toward track and field. As a sprinter and long jumper, DeBlass developed the competitive drive that would later distinguish his grappling career — until a career-ending injury at age 18 closed that chapter entirely.

Rather than stepping away from athletic competition, DeBlass redirected his energy toward jiu-jitsu at age 19. He began his BJJ training under Eric Colon before transitioning to the academy of Ricardo Almeida, where his development accelerated sharply. Under Almeida's instruction, DeBlass earned his black belt in 6.5 years — a notably efficient timeline that reflected both his natural aptitude and his willingness to embrace the full physical and competitive demands of the sport.

At age 24, DeBlass opened Ocean County Jiu-Jitsu (OCJJ) in New Jersey, establishing what would become one of the most respected academies on the East Coast. Over the following two decades, OCJJ produced a generation of high-level grapplers — most notably Garry Tonon, who became one of the most recognized submission grapplers in the world — alongside Jen Allen Russell and Kyle Cranmer.

Culture and Standards at OCJJ

The culture DeBlass built at OCJJ reflects a deliberate philosophy: inclusivity enforced through consistent standards rather than symbolic displays. As of September 20, 2025, he maintained a policy of displaying no flags in his academy — national, religious, or ideological. Although he has stated plainly that he is a proud American, he does not hang an American flag in his gym. His rationale is that a training environment's culture is established through leadership and behavior, not visual messaging. His student body has long included gay students, former felons, active law enforcement, and practitioners of Jewish, Muslim, and Christian faiths — all training under the same expectations of mutual respect, regardless of sexual preferences, politics, or religion.

DeBlass kept Ocean County Jiu-Jitsu open throughout the COVID-19 pandemic, primarily spanning 2020 to 2021, and did not personally receive a COVID-19 vaccination during that period. As of September 20, 2025, he noted that in roughly twenty years of running the academy, he had not had a white supremacist enter his gym — offering that fact as evidence that a standards-based approach to culture-building is effective.

DeBlass built one of the most accomplished no-gi grappling résumés of his generation, competing primarily in the Super Pesado (100kg/221lbs) and Ultra Heavyweight (+100kg/221lbs) divisions. His earliest major titles came at the brown belt level: he won the No Gi World Championship weight division in 2007, earned a third-place finish at the World Championship that same year, and followed with a Pan American Championship in 2008 — establishing himself as a dominant force before reaching the sport's highest competitive tier.

Black Belt Titles and ADCC Dominance

At black belt, DeBlass continued to accumulate top finishes on the international circuit. He claimed third-place finishes at the No Gi World Championship in 2009 and 2013, then captured the No Gi World Championship in 2015 in the Master 1 Absolute division — a title that stands as a capstone of his competitive career. In 2013, he added the No Gi Pan American Championship at black belt and swept both the Grapplers Quest National Expert Division title and the Grapplers Quest Worlds Expert Division title.

His ADCC record is among the most distinguished in the American trials circuit. DeBlass won the ADCC American Trials in the weight division in 2009, 2014, and 2016, making him a three-time trials champion. In 2014, he claimed the ADCC New York Super-Fight Championship and earned the Professional Grappling League Super-Fight title. In 2016, he won the ADCC American National Absolute Championship. Across multiple competitive cycles, DeBlass stood as one of the most consistent and formidable presences in American no-gi competition.

DeBlass extended his martial arts career into professional mixed martial arts, competing at the highest organizational levels in the sport. He appeared on the rosters of both the UFC and Bellator MMA, bringing a grappling-first foundation into a striking-integrated ruleset. His foray into MMA represented a natural extension of the competitive philosophy he developed on the grappling mats — a willingness to test his skills against the best available opposition — while broadening his understanding of combat sport across different competitive contexts.

DeBlass serves as Vice President of Grappling at ONE Championship, overseeing the organization's submission grappling programming and advocating for the sport's growth within a major global combat sports platform. In this capacity, he has championed an athlete-first competition model that distinguishes ONE Championship from other organizations in the space.

Athlete Freedom and Competition Policy

Under the policy DeBlass describes, ONE Championship allows contracted grapplers to compete in external events, provided those events do not fall within approximately 30 to 45 days of a scheduled ONE match. The process operates on trust and mutual respect between the organization and its athletes. Since joining ONE, its contracted grapplers have competed at events including CJI, ADCC, WNO (Who's Number One), Polaris, and IBJJF events. DeBlass confirmed that grapplers under ONE Championship contract are also permitted to participate in CJI 2.

As part of ONE Championship's broader programming strategy, DeBlass has worked to include one to two submission grappling matches on mixed cards alongside MMA, Muay Thai, and kickboxing. He provides on-air commentary during broadcasts, offering technical explanations of grappling concepts to educate audiences less familiar with the submission grappling format.

In the week of February 25, 2026, DeBlass publicly criticized reporting that UFC BJJ had announced a policy barring its exclusive athletes from competing at ADCC starting in 2027, with only select roster members permitted to compete at ADCC in 2026. DeBlass called the reported policy "terrible" and described ADCC as "our Olympics," arguing that the restrictions were driven by organizational control rather than athlete benefit. He contrasted that approach directly with ONE Championship's open-competition philosophy and encouraged affected athletes to speak with him. His message was direct: "This is your life. And you only get one life."

DeBlass has used his platform to articulate a consistent set of principles about martial arts training, competitive culture, and the relationship between skill and humility. His public commentary reflects a philosophy grounded in earned competence, mutual respect, and resistance to entitlement.

On Fighting as a Learned Discipline

On December 30, 2025, DeBlass stated plainly: "If you have never trained for at least two years, you cannot fight. That's not an insult. That's reality." He framed fighting not as an innate ability rooted in aggression, size, or strength, but as a learned discipline developed through structured instruction and consistent training against resisting partners. He used the analogy of expecting an untrained person to perform on an ice hockey rink to illustrate the gap between raw physical confidence and actual fighting competence. He also noted that technical training tends to neutralize physical advantages and reduce — rather than increase — a practitioner's desire to engage in unnecessary confrontations. He closed with characteristic directness: "Argue if you want. The truth doesn't need your approval."

On the Black Belt and Academic Achievement

On November 4, 2025, DeBlass addressed ongoing debates within the BJJ community about whether earning a BJJ black belt is comparable in difficulty to obtaining an academic doctorate. Rather than asserting a hierarchy, he offered a self-aware and personal perspective: for him, a doctorate would be "probably about a thousand times harder" than earning his black belt, given that his natural aggression, comfort with physicality, and competitive drive made the black belt path more manageable. He was explicit that this assessment was personal rather than universal, and he rejected any framework that would rank martial arts achievement above or below academic achievement. His conclusion was succinct: "We don't need to compare. We need to respect." His comments came alongside views attributed to Mirko Cro Cop Filipovic, who argued that a legitimate BJJ black belt can be harder than finishing medical school and cited "seven or more years of consistent training" as a benchmark.

On Humility and Conduct in Training Spaces

On January 1, 2026, DeBlass provided context for a viral video showing a nineteen-year-old influencer being repeatedly submitted during a training session at Joel Tudor's academy in California. DeBlass wrote that the influencer had asked to film the session and entered with a confrontational attitude: "This kid is an influencer who came into an open mat AND ASKED TO FILM THIS. Joel was kind and professional and asked if he wanted to start from the knees. The kid responded, 'F*ck that. I'm a wrestler. I want to start from the feet.'" DeBlass used the incident to address the broader issue of entitlement in martial arts spaces: "Don't walk into someone else's academy acting entitled and disrespectful. This isn't your content farm. This isn't your stage. If you want to be welcomed, show humility. If you want respect, earn it." The statement reflected the same values DeBlass has applied at Ocean County Jiu-Jitsu for two decades — that a training space commands a standard of conduct, and that respect in martial arts is earned through behavior, not demanded through presence.