Karoon Jarupianlerd (Thai: การุณ จารุเพียรเลิศ, born 15 August 1985), who boxes as Petchbarngborn Kokietgym or Petchbarngborn Sor Thanapinyo (เพชรบางบอน ก่อเกียรติยิม, เพชรบางบอน ส.ธนภิญโญ), is a Thai professional boxer in Super flyweight division.
Wissanuchai believed that Karoon wouldn't be successful in Muay Thai so he let his son change to professional boxing under Sor Thanapinyo Gym, and Karoon won the Rajadamnern Stadium Light flyweight title in 2009.
[1] On June 4, 2016, he competed with Paul Butler, a British boxer at Echo Arena Liverpool, Liverpool, Merseyside, England in eliminator fight for the winner to challenge WBO Super flyweight title with a Japanese holder, Naoya Inoue.
But the fight was canceled, because Butler can't weight himself in 115 pounds, according to the rules.
[2] However, Karoon was also allowed to fight with Inoue on September 4 of the same year at Sky Arena, Zama, Japan by Chatchai Sasakul, a former WBC Flyweight champion as trainer.