Carlton has confirmed that veteran midfielder Nick Stevens has been forced to retire with a neck injury.

Stevens, who played 231 matches with both Port Adelaide and Carlton, has been advised by doctors that he should retire or he would risk further damage to the injury he suffered during the 2007 season.

It was determined in September that he would not play again, but club and player had to come to an agreement on a financial settlement given he was contracted for another year.

"There has been much speculation on Nick’s future and we have been in discussions with Nick and the medical team since the end of the season after it was revealed he had again injured his neck. Following further discussions this week and a meeting with the AFL, Nick has confirmed his decision to retire," Carlton CEO Greg Swann said.

Stevens said it was disappointing that his career had ended in such a manner, with the Blues on the way up, but he had little option.

"It is very disappointing to have my career end due to injury, retirement is not something I had been thinking about but I have no option due to the neck injury. After consulting with the specialist, the club doctor and the club as well as discussions with my family, I realised the risk in continuing to play football is far too great so the decision was forced on me,” Stevens said.

"What makes it even harder is that Carlton is on the verge of a successful era and I would dearly love to be a part of it. While very disappointed I am thankful that I have been able to play over 200 AFL games and have enjoyed being involved with Carlton and Port Adelaide for over 10 years."

Coach Brett Ratten said it was a blow to the club to lose a player of such talent and experience.

"Nick has been a very important player for Carlton in his six years with the club. He has played a vital role in the development of the younger players at the club through his leadership and there has never been a question on his ability to win and use the ball," Ratten said.

"At his peak he has certainly been one of the elite midfielders in the AFL. He has been runner-up in the John Nicholls Medal on two occasions and was also runner-up and third in the Port Adelaide Best and Fairest Award before joining Carlton. We will certainly miss his talent and importantly his experience."