Sangtiennoi Sor.Rungroj (Thai: แสงเทียนน้อย ส.รุ่งโรจน์) was a decorated Thai Muay Thai fighter.^[1] A veteran of over 200 fights, he was a Lumpinee Boxing Stadium and Rajadamnern Stadium champion as well as being WMC World Champion, and remained a Muay Thai trainer at his own Tor.Sangtiennoi gym near Bangkok, until his death on May 16, 2021.

Sangtiennoi had his first fight at 13 years of age against his parents' will, and won 100 baht.^[2] He moved to Lukmingkwan gym to start his career in Bangkok, where he took the name Sangtiennoi Sitsurapong.

Sangtiennoi was one of the most popular Muay Thai fighters of his era, receiving purses of over 200,000 baht. His aggressive fighting style made him a fan favorite and saw him fighting for the King's Birthday events against famous international competitors including Dany Bill and Ramon Dekkers.

Sangtiennoi was also a primary training partner and Thai-based teacher of successful Australian Muay Thai fighter John Wayne Parr.

During his fight with Yucel Fidan in 1999 Sangtiennoi, dislocated his shoulder. The injury would continue to hinder him, and he was forced to retire in 2000 when his shoulder was damaged against Takashi Ito in Japan.

During the recovery from injuries, Sangtiennoi opened a gym in his native Pathum Thani.^[3]

On May 16, 2021, Sangtiennoi took his own life with a gun, at the age of 54.^[4]

World Muay Thai Council

• • 1988 WMTC World -65kg Champion^[5]

• Lumpinee Stadium
  • 1997 Lumpinee Stadium Lightweight (135 lbs) Champion (one defense)

• Rajadamnern Stadium
  • 1989 Rajadamnern Stadium 130 lbs Champion^[6]