 Nyorai mberi kweiyi ndima - Gaffney akamiririra Ireland pasi rose pamwero wevaduku. Akaita chimiro chimwe chechikwata chechikoro cheIrish muna 2013 kumashure kwekutamba kwake kweCistercian College. Gaffney akatambira timu yeUnder-20 muna 2014 na2015. Haana kutamba mu2014 Under-20 Six Nations asi akatumidzwa muchikwata naMike Ruddock we2014 Junior World Cup. Gaffney akaita mutambo wake wekutanga wechikwata cheU-20 vachipesana neFrance mumatanho edziva. Akatanga uye akatamba maminitsi ose 80 emitambo yose yeIreland sezvo vakapedza chechina mumutambo. Muna 2015 Under-20 Six Nations, Gaffney akaita mutambo wake wekutanga uye akatamba mumitambo miviri yemitambo mishanu, sezvo Ireland yakapedza yechishanu. Muna Kubvumbi 2015, Nigel Carolan akamutumidza muchikwata cheJunior World Cup. Gaffney akatamba mumitambo mitatu yechikwata mumutambo uyu sezvo Ireland yakapedza yechinomwe. 