Like his brother, he started his career in
Muay Thai and would later switch to boxing. In fact, he had been fighting Muay Thai for many years before Khaosai. After becoming a star in Thailand, he followed a long-standing Thai custom of adopting an attention-getting
ringname and thus he became known as Khaokor Galaxy () after
Khaokor, a renowned natural tourist attraction at his birthplace. His transition to boxing came after he became a sparring partner and mentor to Khaosai. At that time, he had been out of Muay Thai for seven years and had no intention of going back to fighting, whether it was Muay Thai or boxing. However, Niwat Laosuwanwat, Khaosai's manager and promoter, saw his potential and invited him to try boxing, hoping to make them the world's first twin world champions. Khaokor Galaxy made his professional boxing début in 1985, winning his first seven fights before capturing the Thailand
bantamweight title in July 1986. On 9 May 1988, he won against
Wilfredo Vazquez to take the WBA bantamweight title. With this victory, the Galaxy brothers became the first twins to be world champions. Khaokor would also be the first Thai bantamweight champion. After Khaokor and Khaosai won their titles,
Tam Pai Doo, a variety TV show on
Channel 9, organized an exhibition bout that pitted the twins against each other, the contest was produced at
Rajadamnern Stadium, Bangkok. Khaosai beat Khaokor by points in three rounds. Khaokor lost the title three months later in his first defense against
Korean
Sung-Kil Moon, when an accidental clash of heads caused a sixth-round stoppage with Khaokor behind on points. He bounced back with five straight wins to earn a rematch with Moon on 9 July 1989. Khaokor won the rematch easily, winning in all 12 rounds on two scorecards and 11 on the third scorecard. Once again though, Khaokor lost the title in his first defence three months later, against
Luisito Espinosa. Surprisingly, he retired at that point with a record of 24 wins and 2 losses. The defeat to Espinosa was unexpected, but Khaokor was caught with a left hook, and about 20 seconds later just collapsed out of thin air. At that time, this matter was a huge sensation in society, it was called
Rok-wubb (โรควูบ, "fainting syndrome"). There was a lot of discussion about it, some people thought that he was being attacked by black magic from his ex-girlfriend. After retirement, Khaokor revealed that it was because he had lost a lot of weight at that time, coupled with stress, that caused it to happen. ==Boxing style==