Former England scrum-half Shaun Perry has been forced to retire because of a knee injury.
The 34-year-old suffered the injury earlier in the season while playing for club side Worcester but has failed to recover and will quit playing with immediate effect.
"Unfortunately, following the injury to my knee earlier this season it has not been possible for me to return to full fitness despite the best efforts of myself and the Warriors' medical team," Perry said.
"Specialist opinion is that I cannot continue a career in professional rugby.
"It is extremely hard to accept the decision that I must retire because, having started playing at the age of seven, rugby has always been a big part of my life.
"I very much hope to continue to be involved in rugby in some capacity."
Perry won 14 England caps and was a member of the 2007 World Cup squad.
His professional club career began at Bristol, where he spent four years before moving to Brive in 2009 and then to Worcester two years later.