Ramba uchiverenga ndima iyi - Akadanwa muchikwata cheIreland chekudzidzira mutambo weSix Nations Championship wa2013
musi wa 17 Ndira 2013, uye akabuda pabhenji vachirwisa Wales neEngland. Kukuvadzwa kwaMike McCarthy kwakareva kuti O'Callaghan akasimudzirwa kutanga XV yemutambo weIreland neScotland musi wa24 Kukadzi 2013. Kudzoka kwaMcCarthy kubva mukukuvara kwakadzosera O'Callaghan kune imwe bhenji kuoneka mumutambo we13 <unk> 13 neFrance. O'Callaghan akabva adonhedzwa kubva kudivi renyika dzese, naLeinster Devin Toner achifarirwa nzvimbo pabhenji kurwisa Italy.