Stamp Kiatniwat

Yutthana Kaensa (, born 7 January 1998), also known as Stamp Kiatniwat (แสตมป์ เกียรตินิวัฒน์), Stamp Sithmorseng (แสตมป์ ศิษย์หมอเส็ง), or Stamp Kratingdaenggym (แสตมป์ กระทิงแดงยิม), is a professional Thai boxer in the Flyweight division. At the age of 17, he was considered the youngest Thai world champion, although the title was for an interim championship. He is also a former WBA Asia Flyweight champion.

Biography and career Yutthana Kaensa, nicknamed Stamp, was born in Lao Suea Kok District (then part of Mueang Ubon Ratchathani District), Ubon Ratchathani Province, and is a cousin of Poonsawat Kratingdaenggym, a former WBA Super Bantamweight world champion.

He won the WPBF Light Flyweight title by defeating fellow Thai boxer Kwanthai Sithmorseng, a former WBA Minimumweight world champion, on August 8, 2014, at Sanam Luang, Bangkok. On September 23 of the same year, he captured the WBA Asia Flyweight title by defeating Samuel Tehuayo, an Indonesian boxer, at Ayutthaya City Park, Ayutthaya Province. He successfully defended this title twice.

On July 29, 2015, he claimed the WBA Flyweight interim title by defeating Gregorio Lebron, a Dominican contender, in Loei Province. He later defended the title against Lebron again on February 9, 2016, at Bangkokthonburi University, Bangkok.

On December 31, 2016, he challenged Kazuto Ioka, the reigning Japanese WBA Flyweight world champion, in an elimination bout at Shimazu Arena, Kyoto, Japan. He lost by TKO in the seventh round.

Stamp regularly trained at the boxing gym inside Bangkokthonburi University with Anant Tualue, the former trainer of Chana Porpaoin (a two-time WBA Minimumweight world champion) and Denkaosan Kaovichit, who held both the WBA Flyweight world title and the WBA Super Flyweight interim title.

Professional boxing record