Oleydong Sithsamerchai (Thai: โอเล่ห์ดง ศักดิ์เสมอชัย; born July 17, 1985, in Tambon Ratsada, Huai Yot District (now Ratsada District), Trang Province) is a professional boxer from Thailand.
He captured the title on November 29, 2007, by defeating fellow Thai based in Japan Eagle Kyowa.
Because before that, many Thai boxers from southern Thailand challenged world champion, but without success.
[1] Sithsamerchai won his third title defense on November 28, 2009, by a majority decision over Juan Palacios.
He lost the WBC strawweight title on February 11, 2011, to Kazuto Ioka by KO.