Career
He claimed two gold medals in the 50 m freestyle at the Southeast Asian Games (2003 and 2005), before losing out to Daniel Coakley of the Philippines in 2007. Chinnapasaen qualified for the men"s 50 m freestyle at the 2004 Summer Olympics in Athens, by posting a FINA B-standard entry time of 23.20 from the Southeast Asian Games in Hanoi, Vietnam. He challenged seven other swimmers on the sixth heat, including three-time Olympian Julio Santos of Ecuador.
He raced to sixth place by one hundredth of a second (001) behind Cyprus" Chrysanthos Papachrysanthou in 23.52.
