He was initially trained by his father alongside his brother Singsayan who became WBC Youth World Super Flyweight champion.
[1] Diesellek travelled to Tokyo, Japan to face Satsuma3373 at Wanchai Muay Thai Super Fight on October 9, 2016.
[6] After defeating Theptaksin Sor.Sornsing by decision on April 4, 2019, Diesellek was matched up with Rungnarai Kiatmuu9 who was considered the most dominant fighter in his division.
Diesellek's success earned him a shot at the reigning WBC Muay Thai 122 lbs world champion Kumandoi Petcharoenvit on October 14, 2019.
[12] Diesellek was scheduled to face Saotho Or.Atchariya for the vacant True4U 122 lbs title at Rangsit Stadium.