Rubuta ci gaba don wannan sakin layi - Thomas ya fara buga wasan farko na Wales a ranar 10 ga Yuni 2001 a kan Japan, kuma an rufe shi a wasu lokuta shida a wannan shekarar. Daga nan sai ya taka leda a gasar 2002 Six Nations.
, kazalika da buga gwaji da Afirka ta Kudu da kuma Romania. An rufe shi sau shida a shekara ta 2003, ciki har da Kasashen shida. Ya buga wasanni biyu na gwaji a kan Argentina a watan Yunin 2006.