Premiership-winning Sydney midfielder Nic Fosdike has announced his retirement from AFL football due to a chronic knee injury.

Fosdike, 28, played 164 games for the Swans, kicking 66 goals, and was an integral part of the club's 2005 grand final victory.

"Due to an ongoing knee injury and following some good honest discussions with the coaches, I've made the decision to retire," Fosdike said in a statement on Friday.

"I realised it was going to be a difficult year managing the injury and I wouldn't be able to contribute at the standard I expect.

"I've had an amazing 10 years at the Sydney Swans and I'm retiring as a life member and a premiership player, achievements I am extremely proud of.

"I look forward to a continuing good relationship with the coaches, players and the club as a whole, the place I've called my home for a big part of my life.

"Now the decision is made to retire, I am looking forward to life beyond footy and the next phase of my life."

Coach Paul Roos praised Fosdike's part in the drought-breaking 2005 victory over West Coast.

"From the moment Nic walked into the club, he always gave 100 per cent and gained the respect of his peers, coaches and the opposition," Roos said.

"I am sure the 2005 grand final, when Nic was in the top four or five players on the day, was one of his greatest achievements and a career highlight.

"Unfortunately Nic's career hasn't ended the way he'd have liked but, in talking to Nic, he is excited about the next phase of his life and we certainly wish him all the best for the future."

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