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 14 years.
Cafodd Alun ei eni yn Abertawe, a dechreuodd ei yrfa rygbi yn chwarae dros Fonymaen RFC cyn symud ymlaen i chwarae dros y Gweilch am y 14 mlynedd diwethaf.