Buuxi weedha soo socota: McMahon wuxuu biladaha naxaasta ah ku guuleystay Ciyaaraha FESPIC 2002 ee 4 × 400 m Relay, Javelin F37 ee Ragga ee 2006 IPC Athletics World Championships iyo Ragga 4 × 100 m T35-38 ee
2011 Koobka Adduunka ee Ciyaaraha fudud ee IPC. Sanadkii 2006, McMahon wuxuu helay Abaalmarinta Guusha Ciyaaraha ee 2006. 2008 Beijing Paralympics, wuxuu galay kaalinta afaraad ee ragga Javelin F37/38.