Whakakiia te rerenga e whai ake nei: I whakakapi a Hadden i a Matt Williams, a i tohua ia i te 15 o Mahuru 2005. I whakangungu a Hadden i te Kura o Merchiston Castle 1st XV i muri i tana whakataunga hei Tumuaki mo te Whakaakoranga Hinengaro i te kura i te 1983. I whakangungu ia i etahi kapa o nga roopu pakeke o Scottish i mua i tana whakatuunga hei kaiawhina kaiako mo nga Caledonian Reds i te tau 1997. I muri mai ka tohua ia hei kaiako mo Edinburgh Gunners (i tenei wa ko Edinburgh Rugby) i te tau 2000 i mua i tana noho hei kaiako mo Scotland. Mai i taua wā kua whakangungu ia i a Scotland ki ngā wikitoria nui i runga i Ingarangi me Wīwī i te
2006 E ono Nations me te wikitoria ano i te Calcutta Cup ki Ingarangi i te 2008 E ono Nations. I wehe atu ia i te taha o te motu i te 2 o Aperira 2009 i muri i te tuarua o nga Whakataunga Ono i tutuki i a raatau i muri i te wikitoria i te tukinga kotahi.