Saiyok was considered in Thailand one of the most promising fighters in the heavier weight classes, however he fell from grace after losing his belts to Singmanee Sor Srisompong, in a controversial match seen by the thai media as fraud.

[3] After the fight, promoters shied away from the disgraced fighter, forcing him to find another job and earn living as fruit merchant.

[6][7] He fought Dylan Salvador in Roschtigrabe, Switzerland, on October 20, 2012, and lost by TKO after he could not continue due to a knee injury at the end of round one.

[14] He beat Seyedisa Alamdarnezam by an extension round decision in a non-tournament match at the Thai Fight Semi-Finals in Bangkok, Thailand on November 30, 2013.

On December 21, 2014, he defeated French phenom Antoine Pinto to become the inaugural Thai Fight 72.5 kg King's Cup Tournament Champion.