 On completion of his AIS scholarship, he joined ACT Premier League club O'Connor Knights for the 2004 winter season and as the NSL had wound up removing any national level opportunities, he played at Belconnen Blue Devils for the NSWPL 2004/05 season.The following summer, with Belconnen outed from the competition, Casey moved to Wollongong Wolves for a brief spell before being signed to New Zealand Knights in April 2006.Adam came on as a second-half substitute in the Knights opening game of 2006–07.