Brisbane defender Justin Clarke has announced his immediate retirement from AFL football at just 22 years of age.

Clarke made the decision to retire due to ongoing symptoms from a concussion he suffered two months ago.

“It’s been a long process to get to this decision. I’ve sought advice from multiple specialists who have all confirmed that the decision to stop playing football is the right one,” Clarke said.

“I’d like to especially thank the Club for their ongoing support and giving me the space to make the right decision, and for providing the opportunity to play football at the highest level.”

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The backman played 56 games for the club since being drafted by the Lions in the 2011 rookie draft.

Brisbane CEO Greg Swann said the club will continue to support Clarke as he moves into life after footy.

“Justin is a quality individual and a highly regarded player within the Club, and I am certain that he will have a very bright future in whichever industry he chooses,” Swann said.

“We will continue to offer Justin as much support as we can as a Club.”

Brisbane will honour the terms of Clarke’s contract, will expires at the end of the 2016 season.