Tuhia he tomokanga mo tenei whitianga - I wikitoria a McMahon i nga mētara parahi i nga Taakaro FESPIC 2002 i te 4 × 400 m relay, te Javelin F37 a nga Tane i te 2006 IPC Athletics World Championships me te 4 × 100 m T35-38 a nga Tane i te 2011 IPC Athletics World Championships
He aha? 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.