Jae Hyuk Heo

Overview

Jae Hyuk Heo (허재혁) is a South Korean heavyweight mixed martial artist known by the nickname “Sing a Song Fighter.”

Standing 6’0″ (182 cm), Heo competes at heavyweight and openweight and is currently affiliated with Kim Dae Hwan Boxing & MMA.

Jae Hyuk Heo’s career has been defined by persistence. After making his professional debut with ROAD FC in 2018, he endured a difficult stretch that included four consecutive official losses. Rather than disappearing from the sport, however, Heo continued competing across MMA and alternative rulesets before producing an unexpected career resurgence beginning in late 2025.

Since December 2025, Heo has defeated Nam Shin Kim, Dong Wan Ko and Hyun Woo Song, improving his professional record to 4-5 and putting together the first three-fight winning streak of his professional career.

His recent performances have also shown greater variety than his early career. After recording consecutive stoppages against Nam Shin Kim and Dong Wan Ko, Heo went the distance against Hyun Woo Song in the main event of DOMVS 4 and earned a unanimous decision.

Early Life & Background

Reliable public information regarding Heo’s childhood and life before combat sports is limited, so those details are best left unspecified.

Jae Hyuk Heo was born on June 20, 1985, in South Korea. His competitive MMA background predates his professional career, and he eventually emerged on the national stage through ROAD FC.

He made his professional debut at ROAD FC 46 on March 10, 2018, facing Jae Hoon Kim in an openweight bout. Despite entering professional MMA relatively late compared with many prospects, Heo immediately demonstrated the trait that would become central to his career: punching power.

He stopped Kim with ground-and-pound at 4:20 of the first round, beginning his professional career with a TKO victory.

The years that followed were considerably more difficult, but Jae Hyuk Heo continued competing despite repeated setbacks. That persistence has ultimately become an important part of his identity as a fighter.

Fighting Style

Heavyweight Power

Jae Hyuk Heo’s most obvious weapon is his power.

Three of his four official professional victories have come by KO or TKO, giving him a 75 percent knockout rate among his professional wins.

At heavyweight and openweight, Heo does not need lengthy combinations to change a fight. His recent victory over Dong Wan Ko demonstrated that clearly, with a left hook initiating the finishing sequence before Heo followed with ground-and-pound for the first-round stoppage.

Aggressive Boxing

Jae Hyuk Heo generally performs best when he can move forward and create exchanges rather than fight a highly technical contest at long range.

His offensive approach revolves heavily around his hands. When he connects cleanly, he has enough power to either produce an immediate stoppage or create an opportunity to finish with follow-up strikes on the ground.

That aggression comes with risk. Four of Heo’s five professional defeats have also occurred by KO or TKO, illustrating the volatility that has characterized much of his career.

Ground-and-Pound

Although Jae Hyuk Heo is primarily associated with his striking, two significant victories have involved ground-and-pound.

He finished Jae Hoon Kim with ground strikes in his professional debut and later stopped Nam Shin Kim the same way at ROAD FC 75.

Heo does not have a recorded professional submission victory, making his grappling more valuable as a means of establishing top position and delivering strikes than as a submission-oriented offensive system.

Improved Composure

The most interesting development in Jae Hyuk Heo’s recent career may be his ability to win without securing a knockout.

Against Hyun Woo Song at DOMVS 4, Heo went two full rounds and earned a unanimous decision. It was the first decision victory of his professional career.

For a fighter whose career had previously been dominated by stoppages—both wins and losses—the performance provided evidence that Heo can manage a fight when an early finish does not materialize.

Professional Career

Jae Hyuk Heo made his professional debut at ROAD FC 46 in March 2018, defeating Jae Hoon Kim by first-round ground-and-pound.

His early momentum quickly disappeared.

Heo faced Chinese heavyweight Aorigele at ROAD FC 53 in May 2019 and was stopped by punches just 50 seconds into the opening round. That defeat began a difficult period in which Heo struggled to establish consistent success against Korea’s heavyweight and openweight competition.

He also competed in modified-rules ROAD FC bouts against Dong Hyun Bae and Gi Hoon Ryu. Because of the altered rules, Tapology does not include those contests in his official professional win-loss record.

Heo returned to official professional MMA against Taisei Sekino at ROAD FC 67 in December 2023 but suffered another first-round TKO defeat.

In August 2024, Heo faced Mac Papalii in the main event of Fighter100 Club 001. The fight became internationally circulated after Papalii opened the contest with a Max Holloway-style gesture inviting Heo to exchange before immediately knocking him out in just 14 seconds.

Jae Hyuk Heo returned to ROAD FC in June 2025 against the 6’5″ Ki Hwan Kim. This time, the fight reached the judges, but Heo suffered a narrow split-decision loss at ROAD FC 73.

At that point, his official record stood at 1-5.

What followed has completely changed the trajectory of his late career.

At ROAD FC 75 on December 7, 2025, Heo stopped Nam Shin Kim with ground-and-pound at 2:16 of the second round, earning his first official MMA victory since 2018.

Just over two months later, he faced Dong Wan Ko at ZFN Origin 3. Heo landed a left hook and followed with ground-and-pound, securing another TKO at only 1:35 of Round 1.

Jae Hyuk Heo then headlined DOMVS 4 against Hyun Woo Song on March 7, 2026.

This time there was no stoppage. Heo completed two rounds and earned a unanimous decision, extending his professional winning streak to three and improving his record to 4-5.

Career Highlights

• 4-5 professional MMA record as of August 2026.
• Born June 20, 1985; currently 41 years old.
• Nicknamed “Sing a Song Fighter.”
• Competes at heavyweight and openweight.
• Currently affiliated with Kim Dae Hwan Boxing & MMA.
• Three of four professional victories by KO/TKO.
• Made his professional debut with a first-round TKO of Jae Hoon Kim at ROAD FC 46.
• Multiple-time ROAD FC competitor with appearances dating back to 2018.
• Ended a seven-year gap between official MMA victories by stopping Nam Shin Kim at ROAD FC 75 in December 2025.
• Stopped Dong Wan Ko with a left hook and ground-and-pound at ZFN Origin 3 in February 2026.
• Defeated Hyun Woo Song by unanimous decision in the DOMVS 4 main event in March 2026.
• Currently riding a three-fight professional winning streak, the longest of his career.

Summary & Trajectory

Jae Hyuk Heo has built one of the more unconventional careers in South Korea’s heavyweight scene. After debuting with a knockout victory in 2018, Jae Hyuk Heo endured years of difficult results, including four consecutive official professional losses and several stoppage defeats.

Yet his persistence has ultimately produced an unexpected second chapter.

Beginning with his victory over Nam Shin Kim at ROAD FC 75 in December 2025, Jae Hyuk Heo has put together three consecutive professional victories. He followed the Road FC win by stopping Dong Wan Ko at ZFN Origin 3 before defeating Hyun Woo Song by unanimous decision in the DOMVS 4 main event. Those results have taken Heo from a 1-5 record to 4-5 in the span of three months.

At 41, Jae Hyuk Heo is not a developmental prospect. His appeal comes instead from his longevity, personality, heavyweight punching power and refusal to walk away during the most difficult stretch of his career.