Rubuta ci gaba don wannan sakin layi - Guy ya zama sananne a duniya lokacin da ya lashe lambobin zinare biyu na gasar cin kofin duniya a tseren mita 200 da tseren mita 4 × 200 a gasar cin kofin duniya na ruwa a shekarar 2015. Wani dan wasan tseren tsere mai ban mamaki, a shekarar 2016, ya lashe azurfa a tseren tsere na 4x200m da tseren tsere na 4x100m
a wasannin Olympics na Rio, inda ya kammala na hudu a tseren mita 200 na 'yanci. Ya taimaka wajen kare taken duniya na maza na 4 x 200 mita mai kyauta a shekarar 2017, kuma ya yi iyo a kafar malam buɗe ido don taimaka wa Burtaniya ta lashe zinare a tseren tseren mita 4 x 100 a Gasar Cin Kofin Duniya ta 2019. Guy dan wasan Commonwealth ne kuma zakaran Turai sau bakwai a cikin wasannin relay daban-daban.