<page_title> List of undefeated boxing world champions </page_title> <table> <cell> Thailand Pichit Sitbangprachan <col_header> Boxer </col_header> </cell> <cell> Retired at 21–0 and then made a comeback. <col_header> Notes </col_header> </cell> </table>
Pichit Sitbangprachan is one of just fifteen world boxing champions to retire without a loss.