Kammala wannan jumla: Da yake girma a Adelaide kuma Glenn Beringen ya horar da shi a Cibiyar Wasannin Kudancin Australiya, Mitchell ya fara zama a
Wasannin Commonwealth na 1994 a Victoria, British Columbia, Kanada. Ya kasance mai lambar azurfa a shekarar 1995 a tseren mita 200 a gasar zakarun duniya a Rio de Janeiro. Ya sami zaɓi ga ƙungiyar ƙasa don Wasannin Olympics na bazara na 1996 a Atlanta, bayan ya mutu tare da Phil Rogers don cin nasarar tseren mita 200 a gasar zakarun Australiya. A watan Disamba na wannan shekarar, Mirchell ya karya tarihin duniya na maza 4 × 100 mita medley relay da kuma rikodin Australiya & Commonwealth Shortcourse na mita 200 na nono. Ya yi iyo a hankali a gasar Olympics, ya gama a wuri na goma sha ɗaya.