Ramba uchiverenga ndima iyi - Achikura muAdelaide uye achidzidziswa naGlenn Beringen paSouth Australian Sports Institute, Mitchell akatanga kupinda muMitambo yeCommonwealth muna 1994
muVictoria, British Columbia, Canada. Iye akanga ari 1995 menduru yesirivha mumamita 200 echipfuva pamakwikwi epasi rose epfupi muRio de Janeiro. Akakunda kusarudzwa kwechikwata chenyika ye 1996 Summer Olympics muAtlanta, mushure mekupisa-kufa naPhil Rogers kuti vakunde 200-metre breaststroke kuAustralia Championships. Muna Zvita wegore rimwe chetero, Mirchell akaputsa rekodhi yenyika yeVarume 4 × 100 metres medley relay uye yeAustralia & Commonwealth Shortcourse rekodhi yemamita mazana maviri. Akashambira zvishoma nezvishoma paOlympics, achipedza ari panzvimbo yegumi neimwe.