 Nyorai mberi kweiyi ndima - Gregson akapedza ari wechishanu mumakwikwi evakomana emamita 1500 pa2007 World Youth ChampionshipsmuOstrava. Gare gare gore iroro, akaisa zvinyorwa zvitsva zvevechidiki zveAustralia pamusoro pe1500 metres, 3000 metres uye 5000 metres, yake 3000m clocking ye8: 01.26 zvakare eclipsing Craig Mottrams Australian junior record. Pa2008 World Junior Championships muBydgoszcz akapedza zvakare wechishanu pamusoro pe1500 metres uye zvakare akapinda mumamita 5000. Muna 2009, gore rake rekupedzisira semudiki, akaisa zvinyorwa zvitsva zveAustralia zvevadiki pane ese ari maviri 3000 uye 1500 metres, nenguva dza7: 57.45 uye 3: 37.24 zvichiteerana. 