Kammala jumla mai zuwa: Kwarewar sa ta farko game da gasar tsere da filin wasa ya kasance a matsayin dan tseren tsalle-tsalle na junior kuma John Anderson, alkalin wasa na gidan talabijin na Burtaniya "Gladiators" kuma mai horar da tsohon mai rikodin duniya Dave Moorcroft, ya bukace shi da ya mai da hankali kan wasannin motsa jiki. Horar da shi a Corby Athletics Club, ya fara fafatawa a cikin wasan goma da mita 110 kuma ya zama dan wasan Burtaniya mai lamba 1 a karkashin shekaru 20 a duka fannoni. A gasar zakarun kasa da shekaru 20 na kungiyar 'yan wasa masu son yin wasa (AAA) a shekarar 2003, ya lashe gasar decathlon. Babban gasar matasa ta farko ita ce Gasar Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Ya yi gasa a taron AAA na 2004 kuma ya gama na uku a cikin shinge, a bayan Robert Newton da Paul Gray. A cikin
A gasar zakarun Turai ta 'yan kasa da shekaru 23 a shekarar 2005, Sharman ya kasance a waje da lambobin yabo tare da kammala na hudu. Raunin da ya samu a wannan shekarar ya lalata ikonsa na jefa mashi kuma ya yanke shawarar yin watsi da gasar decathlon don mai da hankali ne kawai kan shinge.