Thanawat made his Professional Darts Corporation debut at the 2014 PDC World Cup of Darts in Hamburg, representing Thailand alongside Watanyu Charonrooj. They were whitewashed 5–0 in the first round by England's Phil Taylor and Adrian Lewis. Thanawat also competed at the 2015 and 2016 World Cup events with Attapol Eupakaree, again losing in the first round on each occasion.