Rubuta ci gaba don wannan sakin layi - Bayan kyakkyawan aikinsa na Llanelli Scarlets a duka Celtic League, da kuma Heineken Cup a lokacin kakar 2005/06, an kira shi zuwa ga 'yan wasan kasa don jerin gwaje-gwajen Nuwamba. Ya fara bugawa a matsayin mai maye gurbin All Blacks a ranar 5 ga Nuwamba a filin wasa na Millennium. Wales ta yi rashin nasara 3<unk>41. Ya kuma taka leda a nasarar da Fiji ta samu, da kuma rashin nasarar da Afirka ta Kudu ta samu. Tun daga wannan lokacin ya taka leda a gasar zakarun kasashe shida ta 2006.
, kuma ya sami ƙarin wasanni biyu a cikin jerin tsakiyar shekara da Argentina. Kallon da ya yi a wasannin kasa da kasa na kaka na 2006 shi ne a gefen da ya yi da tsibirin Pacific. Byrne ya kasance wahayi a gasar zakarun kasashe shida ta 2008 a cikakken baya kuma babban bangare ne na Wales's Grand Slam.