lateral sclerosis, also known as Lou Gehrig's disease. The disease is incurable. In 2006, Phayao died at the age of 48 at Siriraj Hospital in Bangkok. He was survived by his wife and several children. Professional boxing record Muay Thai record |- style="background:#cfc;" | 1980-07-07|| Win||align=left| Somnoi Bankhod || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 ||3:00 |- style="background:#fbb;" | 1978-04-|| Loss||align=left| Singthong Prasopchai || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 ||3:00 |- style="background:#fbb;" | 1977-11-17|| Loss||align=left| Orachunnoi Hor Mahachai || Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 ||3:00 |- style="background:#;" | 1977-09-09|| ||align=left| Singthong Prasopchai || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 ||3:00 |- style="background:#;" | 1977-04-04|| ||align=left| Phanomthian Sakmanuchai || Rajadamnern Stadium || Bangkok, Thailand || || || |- style="background:#fbb;" | 1975-04-07|| Loss||align=left| Anantachai Singbangsaen || Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 ||3:00 |- | colspan=9 | Legend: References External links Professional record on Cyber Zone Boxing Encyclopedia Bangkok Post obituary New York Times obituary 1957 births 2006 deaths Neurological disease deaths in Thailand Deaths from motor neuron disease Boxers at the 1976 Summer Olympics Payao Poontarat Payao Poontarat Super-flyweight boxers World super-flyweight boxing champions World Boxing Council champions Payao Poontarat Payao Poontarat Payao Poontarat Olympic medalists in boxing Payao Poontarat Payao Poontarat Medalists at the 1976 Summer Olympics Southeast Asian Games medalists in boxing