Originally from New South Wales, Southern has spent the majority of his rugby league career playing in the NRL in Australia. He played his junior rugby with Dapto Juniors and progressed through the youth development system at St George Illawarra Dragons. Southern is affectionately known by NRL fans as “Bluey”
In 2004, at the age of 22, Southern signed for North Queensland Cowboys senior team. He played the Cowboys for seven seasons, making his debut in 2004. During his time at the club, Southern made 124 appearances for the first team, scoring 12 tries. The highlight of Southern’s career with the Cowboys was their 2005 Grand Final appearance in which Southern played second row.
Southern was forced to undergo reconstructive knee surgery in 2010 after tearing ligaments, preventing him from playing the majority of the season. After seven seasons at the Cowboys, Southern made the switch to Newcastle Knights for the 2011 season. Southern made six appearances for Newcastle but, whilst recovering from his knee injury, spent most of the season playing for Knights’ NSW Cup feeder club Central Coast Centurions. Southern came off the bench for Newcastle in the qualifying round of the NRL playoffs in September but the club were defeated by Melbourne Storm 18-8.
In August 2011 Southern agreed a deal with Wakefield Trinity Wildcats, signing a three year contract with the club.
|03/02/2012||20:00||Super League||Widnes Vikings||14 - 32||Wakefield Trinity|
|12/02/2012||15:30||Super League||Wakefield Trinity||10 - 22||Hull KR|
|25/02/2012||19:45||Super League||Wakefield Trinity||18 - 36||Bradford Bulls|
|04/03/2012||15:00||Super League||Hull FC||14 - 10||Wakefield Trinity|
|11/03/2012||15:30||Super League||Wakefield Trinity||14 - 32||Huddersfield Giants|
|18/03/2012||15:00||Super League||Warrington Wolves||32 - 30||Wakefield Trinity|
|25/03/2012||15:30||Super League||Wakefield Trinity||32 - 22||Catalan Dragons|
|31/03/2012||17:45||Super League||London Broncos||36 - 0||Wakefield Trinity|
|06/04/2012||19:30||Super League||Wakefield Trinity||16 - 34||Castleford Tigers|
|20/05/2012||15:30||Super League||Wakefield Trinity||12 - 42||Warrington Wolves|
|26/05/2012||13:00||Super League||Castleford Tigers||26 - 32||Wakefield Trinity|
|03/06/2012||15:30||Super League||Wakefield Trinity||24 - 6||London Broncos|
|10/06/2012||15:30||Super League||Wakefield Trinity||32 - 30||Hull FC|
|18/06/2012||20:00||Super League||Leeds Rhinos||44 - 40||Wakefield Trinity|
|24/06/2012||15:00||Super League||Bradford Bulls||34 - 26||Wakefield Trinity|