Born: October 5, 1985
Nationality: English
Hometown: Leeds, England
Height: 170 cm
Reach: 174 cm
Stance: Orthodox
Primary Style: Muay Thai (pressure striker)
Team: Bad Company Thai Boxing Gym (England)
Trainer: Richard Smith
Era: Modern Era (2000s–2020s)

Career Record

Muay Thai & Kickboxing (professional – documented)

  • Total fights: ~120

  • Wins: 91–92

  • Wins by KO/TKO: 49–50

  • Losses: 26

  • Draws: 2

Record reflects elite-level competition across stadium Muay Thai, international promotions, and ONE Championship.

Profile

Liam Harrison is the defining Western Muay Thai pressure fighter of the modern era.

While many foreign fighters relied on athleticism or kickboxing-heavy approaches, Harrison built his career on traditional Muay Thai fundamentals: forward pressure, heavy low kicks, elbows in transition, and attritional pacing. His nickname, The Hitman, reflects not a single weapon, but sustained damage over time.

From local shows in Leeds to Lumpinee Stadium, YOKKAO, and ONE Championship, Harrison consistently sought the hardest available opponents — Thai and non-Thai alike — across multiple weight classes.

Fighting Style

Harrison is best described as a Muay Mat–Muay Bouk hybrid, adapted for modern international rulesets.

Key traits:

  • Punishing low kicks and calf kicks

  • Elbows in close range and exits

  • Constant forward pressure

  • High-volume combinations late in rounds

  • Exceptional toughness and recovery

Unlike single-shot knockout artists, Harrison broke opponents down systematically. Many of his stoppages came after cumulative damage rather than sudden finishes.

Stadium & International Career

Harrison is one of the few Western fighters to build a long-term career competing inside Thailand while also defending world titles internationally.

Key achievements include:

  • Extensive competition at Lumpinee Stadium and Rajadamnern Stadium

  • Long-running rivalry-level bouts with elite Thai champions

  • Success across Muay Thai, kickboxing, and tournament formats

He is widely regarded as the most accomplished British Muay Thai fighter of all time.

ONE Championship Era

Harrison joined ONE Championship in 2018 as part of the ONE Super Series.

Notable moments include:

  • First-round KO win at ONE: A New Tomorrow (2020)

  • Career-defining TKO win over Muangthai P.K.Saenchai at ONE 156 (2022), earning a $100,000 bonus

  • Title challenge against Nong-O Gaiyanghadao for the ONE Bantamweight Muay Thai World Championship

His ONE run showcased the effectiveness of traditional Muay Thai pressure under small-glove, high-pace conditions.

Titles & Championships

Major Titles:

  • WBC Muay Thai Diamond World Champion (2025)

  • WBC Muaythai World Champion −147 lbs

  • WMC Lightweight World Champion −61.5 kg

  • WPMF World Champion −63.5 kg

  • YOKKAO World Champion −65 kg

  • WAKO Pro Low-Kick World Champion −62 kg

  • Patong Stadium Champion −68 kg

Awards:

  • Muay Siam Magazine Foreign Fighter of the Year

  • Multiple-time Leeds Sports Federation Sportsman of the Year

Later Career, Injury & Return

Repeated knee and leg injuries forced extended layoffs in the 2020s. After a high-profile loss to Saeksan Or. Kwanmuang in 2024, Harrison appeared to retire — laying his gloves in the ring.

In 2025, he returned to capture the WBC Muay Thai Diamond Belt, reinforcing his reputation as one of the toughest and most durable fighters of his generation.

Legacy

Liam Harrison is remembered as:

  • The most accomplished Western Muay Thai pressure fighter ever

  • A fighter who proved traditional Muay Thai could succeed globally

  • A bridge between stadium-era values and modern entertainment platforms

  • A benchmark for toughness, consistency, and longevity