England and Harlequins centre Stuart Abbott has announced his retirement from competitive rugby at the age of 29 because of a serious shoulder injury.
Abbott suffered a series of injuries during his time with Quins
Abbott, a member of England's World Cup-winning squad four years ago, won nine caps between 2003 and 2006.
"It's very upsetting to see a player of Stuart's calibre forced to retire early because of injury," said Quins director of rugby Dean Richards.
Abbott won two Premiership titles and the Heineken Cup with Wasps.
He moved to Harlequins in 2006, but a succession of injuries meant he made just 17 appearances for the club, scoring two tries.
Richards added: 'I'm very sorry to see Stuart go and I would like to wish him all the best with his future plans.
"Stuart was an outstanding all-round footballer, who was great in defence and attack. He will be missed at Quins."
Abbott was rated as one of the country's finest young centres, with Will Greenwood tipping him as his long-term successor in England's number 12 shirt.
He was born in South Africa, but had an English mother and moved to England in 1999 for a brief spell with Leicester.