Yodsanan Sor Nanthachai

In addition to boxing, he is also a mixed martial artist who competed for ONE Championship in their Bantamweight division from 2011 to 2017.

In early 2011 it emerged that Yodsanan had started training in Mixed Martial Arts at Evolve MMA in Singapore. On July 15, 2011 it was announced that Yodsanan had signed with ONE Fighting Championship. This has led some journalists to suggest that Yodsanan will be the best boxer to ever switch from boxing to MMA.

In November 2010, he received an honorary master's degree in sports science from Sisaket Rajabhat University.

On 2 February 2009 Yodsanan defeated Jonathan Simamora by third round KO to win the vacant IBF Australasian Light Welterweight title.

In 2009, he was a boxing trainer for Evolve MMA in Singapore.

Yodsanan has fought several professional Muay Thai fights. Notably on 8 March 2007 when he fought Bovy Sor Udomson at Rajadamnern Stadium losing by decision.

Yodsanan successfully defended the title three times defeating Lamont Pearson, Ryuhei Suguta and Steve Forbes. On 30 April 2005 he faced challenger Vicente Mosquera at Madison Square Garden. Yodsanan became the first man to ever knock Mosquera down but still lost the fight by unanimous decision.

Yodsanan turned pro in 1993 and won his first five fights by KO. In 1997 he defeated Run Tangkilisan to win the interim PABA Super Featherweight Title. He defended the title 20 times before vacating it in order to challenge for the WBA Super Featherweight title which he won by defeating Lakva Sim on 13 April 2002.

Yodsanan Sor Nanthachai or Yodsanan Sityodtong a.k.a. Yodsanan 3-K Battery (Thai: ยอดสนั่น 3เคแบตเตอรี่; born name Theera Phongwan new name Theepaphat Phongwankittikun August 17, 1974 in Phrai Bueng District, Srisaket Province, Thailand) is a Thai professional boxer in super featherweight division. Yodsanan fights out of Evolve Mixed Martial Arts in Singapore, where he is a member of the Evolve MMA Fight Team.