Alun was born in Swansea and began his rugby career by playing for Bonymaen RFC before progressing to play for the Ospreys for the past 12 years.
Ganwyd Alun yn Abertawe, a dechreuodd ar ei yrfa'n chwarae rygbi i Glwb Rygbi Bon-y-maen cyn symud ymlaen i chwarae i'r Gweilch am y deuddeg mlynedd ddiwethaf.