Dallas attended Cookstown Primary School and Cookstown High School during his education, winning the U14 and U15 Coleraine and District League titles with the high school in 2004 and 2005 [REF].
Dallas made two appearances in Crusaders' Europa League second qualifying round matches against Premier League side Fulham early in the 2011-12 season, starting both games as Crusaders lost 7-1 on aggregate.