Kasem Prapaisri was born in 1946 in Paedriew, Chachoengsao Province, once classmate with famous promotor Songchai Rattanasuban he had his first Muay Thai fight at the age of 17 using the ring name "Sukkasem Luksiyaek".

The media reported on that event and he was dubbed "the Executionner from Padriew", it's with this reputation that he came to fight in Bangkok with very little experience using the ring name "Sukkasem Sor.Sanguansak".

Victim of stage fright, the referee stopped the action thinking he was throwing the fight, his skillset not matching his reputation.

After a few wins he convinced the officials that he wasn't the kind of fighter to take dives and was welcomed back.

During his fighting career Sirimongkol gave a share of every purse he got to the family of the fighter he killed in the ring.