 In honour of O'Callaghans hurling club performances for St Marks in 2006, he was named on the 2006 Dublin Bus/Evening Herald Blue Star hurling XV.He won the Leinster Minor football championship with Dublin in 2001.2007 has started very well for David, he scored 2-5 (0-1f) against the Dublin Blue Stars in a challenge match which saw Dublin win by a scoreline of 3-17 to 0-12.