[7] The brothers were raised in Murwillumbah in northern New South Wales, where they both played junior rugby league until aged 16.

[1] In 2010, Rory joined the Murwillumbah rugby club where he played for two seasons before being scouted by the Gold Coast Breakers.

[10][11] He joined South African side Griquas for the 2013 Currie Cup Premier Division competition.

[1] Arnold underwent a shoulder reconstruction and sat out most of the 2014 season before joining the University of Canberra Vikings in the inaugural National Rugby Championship.

[16] As of 2015[update], Arnold was among the tallest players in Super Rugby, behind South African lock JP du Preez at 1 cm taller.