Mezue ahịrịokwu na-esonụ: N'afọ 2011 ka Harrison mere nke ọma n'ọkwa ndị okenye. O meriri asọmpi mbụ ya na asọmpi UCI Track World Cup na Beijing, na-emeri omnium. Ọbịbịa mbụ nke Harrison na UCI World Track Championships bịara na
2011, nke ọ meriri ọla nchara dịka akụkụ nke Team Pursuit. A họpụtara ya na ngwụcha mgbe onye na-amalite mgbe niile bụ Ed Clancy dara ọrịa. Harrison mechakwara nke iri na otu na omnium.