McMahon akahwina menduru dzebronze pa2002 FESPIC Games mumakwikwi e4 × 400 m, Men's Javelin F37 pa2006 IPC Athletics World Championships uye Men's 4 × 100 m T35-38 pa2011 IPC Athletics World Championships
. Muna 2006, McMahon akagamuchira 2006 Sports Achievement Award. Pa2008 Beijing Paralympics, akapedza wechina muVarume Javelin F37/38.