BRISBANE small forward Allen Christensen has retired, ending a career that netted him a premiership among 133 games across two clubs.

Christensen, 29, told his teammates on Wednesday that his 11-season career was over.

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The man nicknamed 'Bundy' played 65 games for Geelong, including the 2011 Grand Final triumph over Collingwood, before moving to Brisbane following the 2014 season.

He went on to play 68 games in six seasons at the Lions, but couldn't crack the top team in 2020.

"Obviously the flag is something I will look back on with great fondness, but it happened so long ago and I was so young and at the time I guess I was just thinking about continuously trying to get better and better," Christensen said.

"Now it is all over I can say I’m very fortunate to have had the career I’ve had, I played at two big clubs and enjoyed some success.

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"I am happy with the footy I played at the Lions, I played a different role here and I feel I was able to make a contribution.

"I was very proud to be a part of the side that returned our club to the finals last year.

"We have come a long way, it was a crazy year and to have been able to make a contribution towards that is something that I will always carry with me."

Christensen also played a huge off-field role in Brisbane, part of the group that developed the club's Reconciliation Action Plan and the formation of the RAP Committee which he co-chaired.

He became an ambassador for Deadly Choices, designing the Lions’ 2020 Indigenous guernsey for Sir Doug Nicholls Round and educating fellow players and staff about Indigenous culture.

He was also passionate about raising awareness about the dangers of gambling addiction after fighting his own battles.

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"I came here at a time where the club’s culture and its performance on the field wasn’t great and I also had a lot of stuff going on in my life too," he said.

"The club has helped me tremendously and I’m proud that I can say I feel I have made an impact on them too."