All Black and Hurricanes lock James Broadhurst is calling it quits on rugby, due to ongoing effects of concussion.
Broadhurst has not played since suffering dual head knocks during a Mitre 10 Cup match while playing for Taranaki against Wellington in August 2015.
The 29-year-old said he had been advised by medical experts to walk away from the game he loved.
"I've been away from the game for a little over 18 months and still experience symptoms which affect my daily life.
"Some extensive efforts have gone into getting me back to sport by medical professionals in and out of rugby. Even though it hasn't resulted in the outcome I had hoped for."
He said his health had improved massively.
"The support I've received from players and management has been overwhelming. I'd like to thank every player and coach I've been involved with over the years who have assisted me on my rugby path, and everyone who will assist me during my transition to the next stage of life.
"They say for a door to open, others must close, so I look forward to the next chapter in anticipation, rather than looking back at the rugby chapter with sadness."
Broadhurst earned a test cap for against South Africa at Ellis Park in Johannesburg in 2015 where he was part of the 27-20 All Blacks win.
He's played 71 matches for the Hurricanes, 20 for Canterbury and 55 for Taranaki.
Hurricanes coach Chris Boyd said Broadhurst had made a big contribution to the club on and off the field since making his debut against the Force in 2010.
"James is a good man who played some exceptional rugby for the Hurricanes, particularly in 2015. The timing of his injury was unfortunate because he was starting to really realise his full potential.
"It can't have been easy for him to be told to walk away from the game and everyone at the club wishes him all the best for whatever lies ahead," Boyd said.