Mayweather legacy faces challenge from Thai 'dwarf giant' An unsung Thai boxer one win from equalling Floyd Mayweather Jr's flawless 50-0 record hopes to make history by defeating Panamanian Leroy Estrada this week. Wanheng Menayothin, a WBC minimumweight champion who is unknown outside boxing circles despite his 49 wins, faces the challenger in northeastern Thailand on Wednesday 2nd May. IMAGES AND SOUNDBITES. REFILE TO ADD LATEST TEXT STORY.