[1] From Santry, where he played his football with St Kevin's Boys before he was enticed across to Leeds United.
He was a member of the Leeds team that won the FA Youth Cup in 1997 when his teammates included Harry Kewell, Jonathan Woodgate, and Stephen McPhail.
Released by Leeds, he was signed by Nottingham Forest in October 2001 where he played reserve team football.
[2] Damian signed for the Saints in 2008 from Drogheda and played an important part in their UEFA Cup 2008–09 campaign.
[4] His final game in professional football was away to Drogheda United in a 1–0 win for The Saints on 5 October 2010.