Whakakihia te rerenga e whai ake nei: I wikitoria a McMahon i nga mētara parahi i te 2002 FESPIC Games i te 4 × 400 m relay, Men's Javelin F37 i te 2006 IPC Athletics World Championships me Men's 4 × 100 m T35-38 i te
Ko te 2011 IPC Athletics World Championships. I te tau 2006, i whakawhiwhia a McMahon ki te Tohu Tohu Taakaro 2006. I te 2008 Beijing Paralympics, i mutu ia i te tuawha i te Men's Javelin F37/38.