Mezue ahịrịokwu na-esonụ: Stamper bụ onye nrite ọla nchara na
2011 World Taekwondo Championship. Ọ sonyekwara n'egwuregwu Olimpik n'afọ 2012 wee ruo ọkara ikpeazu. O meriri Rohullah Nikpai nke Afghanistan n'asọmpi iji nweta ọla nchara, wee nọrọ n'ọnọdụ nke ise.