Mezue ahịrịokwu na-esonụ: McMahon meriri ọla nchara na 400m freestyle na 2010 European Junior Swimming Championship na Helsinki na oge nke 4:15.92, ihe ndekọ Irish junior. N'ime
2011 Championships na Belgrade o meriri ọla edo na 400m freestyle na oge nke 4:13.85 (ihe karịrị 2 sekọnd ngwa ngwa karịa oge ya n'afọ gara aga), ọla edo ọzọ na 50m breaststroke na oge nke 32.00 (0.2 sekọnd ngwa ngwa karịa onye mmeri nke afọ gara aga Lisa Fissneider), na ọla ọcha na 200m freestyle na oge nke 2:00.61, 0.11 sekọnd n'azụ Russian Ksenia Yuskova.