Career
He graduate bachelor degree from Sukhothai Institute of physical education. At the 2005 World Amateur Boxing Championships he was surprised in his first match by Cuban southpaw Andry Laffita and lost 14:16. In 2005 he also competed for Thailand at the Boxing World Cup in Moscow, Russia, winning both his matches in the preliminary round.
He had beaten the Filipino three times before.
He beat Vincenzo Picardi to reach the finals in the 2007 World Amateur Boxing Championships where he lost against local southpaw Raushee Warren. He represented Thailand in the Beijing 2008 Olympics Flyweight category and said that it would be his last contest after which he would continue his boxing career as a national team coach.
In Muay thai his name is Silachai Wor preecha. (Thai: ศิลาชัย วปรีชา)
Olympic games results
2004 (as a flyweight)
Defeated Kim Ki-Suk (South of Korea) 22-12
Lost to Yuriorkis Gamboa (Cuba) 21-26
2008 (as a flyweight)
Defeated Eddie Valenzuela (Guatemala) 6-1
Defeated Samir Mammadov (Azerbaijan) 10-2
Defeated Anvar Yunusov (Tajikistan) 8-1
Defeated Vincenzo Picardi (Italy) 7-1
Defeated Andry Laffita (Cuba) 8-2
World amateur championships results
2003 (as a flyweight)
Defeated Ramazan Ballioglu (Turkey) RSCO 3
Defeated Bato-Munko Vankeev (Belarus) 10-5
Defeated Yuriorkis Gamboa (Cuba) 23-22
Defeated Rustamhodza Rahimov (Germany) 12-5
Defeated Jerome Thomas (boxer) (France) 24-17
2005 (as a flyweight)
Lost to Andry Laffita (Cuba) 14-16
2007 (as a flyweight)
Defeated Ramadan Rezgallah (Egypt) 17-9
Defeated Mirat Sarsembayev (Kazakhstan) 17-8
Defeated Rafał Kaczor (Poland) 15-3
Defeated Vincenzo Picardi (Italy) 13-2
Lost to Rau"shee Warren (United States) 9-13 (final match).