“I feel more energetic, elusive, and faster” - Jaosuayai says he’ll be even better at strawweight after improved conditioning

Thai knockout artist Jaosuayai Mor Krungthepthonburi is ready to begin a new chapter in his career in a new division.

The flyweight Muay Thai contender has decided to move down a weight class and will make his strawweight debut in the promotion’s final event of 2025, ONE Friday Fights 137.

On Friday, Dec. 19, Jaosuayai will take on former two-sport and two-division world champion Sam-A Gaiyanghadao inside ‘The Mecca of Muay Thai’ Lumpinee Stadium in Bangkok, Thailand.

The 24-year-old won a six-figure deal with the home of martial arts after a sensational five-fight winning streak.

However, his momentum was halted by undefeated Akif ‘King’ Guluzada at ONE Fight Night 36 last October.

That loss forced Jaosuayai to explore his options and decide to make the move to 125 pounds.

Speaking to ONE Championship, the Sor Dechapan product shared that his body feels sharper than ever at the lighter weight.

"I feel more energetic, elusive, and faster now, which should lead to more evenly matched and exciting opponents than at 135 pounds. However, I want to emphasize that I am happy to fight at both 125 pounds and 135 pounds."

Jaosuayai is excited to showcase how his refined physique has optimized his world-class striking skills.

He’ll have a chance to make an immediate impact in his new weight class if he beats the Thai living legend at ONE Friday Fights 137.

---

ONE Friday Fights 137 full event

Tawanchai PK Saenchai vs. Liu Mengyang (kickboxing – featherweight)

Kulabdam Sor Jor Piek Uthai vs. PTT Apichart Farm (Muay Thai – bantamweight) Suablack Tor Pran49 vs. Pakorn PK Saenchai (Muay Thai – bantamweight)

Sam-A Gaiyanghadao vs. Jaosuayai Mor Krungthepthonburi (Muay Thai – strawweight)

Yod-IQ Or Pimolsri vs. Elbrus Osmanov (Muay Thai – bantamweight)

Jo Nattawut vs. Mohammad Siasarani (Muay Thai – featherweight)

Zhang Peimian vs. Thongpoon PK Saenchai (kickboxing – strawweight)

Gingsanglek Wor Kumchamnarn vs. Suriyanlek Por Yenying (Muay Thai – flyweight)

Dedduanglek TDed99 vs. Shimon Yoshinari (Muay Thai – flyweight)

Duangdawnoi Looksaikongdin vs. Regan Gowing (Muay Thai – atomweight)

Asahi Shinigawa vs. Denkriangkrai Singha Mawynn (Muay Thai – strawweight)

Pet Suanluangrodyok vs. Ryuya Okuwaki (Muay Thai – atomweight)

ONE Friday Fights 137 streams live and free on watch.onefc.com and ONE Championship's social platforms on December 19.