Medgoen turned pro in 1997 and in 1999, captured the Lineal Flyweight Championship with a win over Filipino boxer Manny Pacquiao.
Medgoen is promoted by Thai Storage Battery Public Company Limited, and hence bears the 3K Battery name, as the company contracts Thai boxers to sponsor their products.
Virat revealed on YouTube in 2021 that Pacquiao had said to him that he would have knocked out Medgoen in no more than three rounds if he had fought in perfect physical condition.
His second cousin, Saranyoo Tohchoodee, born in Thailand on April 18, 1991, was also a professional boxer before giving up boxing to go to America to study along with his sister.
He was going to play for the Thailand national team until he broke his ankle in a game and never could fully recover, but he did manage to become a very good table tennis player in the meantime.