Former Wales scrum-half Dwayne Peel has been forced to retire because of an ongoing shoulder injury.
Peel has managed only 20 appearances for Bristol since 2014 and is to join the coaching staff of the Championship leaders for the rest for the season.
The 34-year-old amassed 76 caps, was part of the Grand Slam-winning teams of 2005 and 2008 and captained Wales at the 2007 World Cup.
Peel, Bristol's captain, also started all three Tests on the 2005 British and Irish Lions tour to New Zealand in 2005.
"It was a tough decision to make because I love the game but, following medical advice, I really had no further choice," Peel said.
"I've been fortunate enough to enjoy some incredible experiences during my playing career and have met some fantastic people.
"I'm grateful to Bristol for their support and will continue to work hard alongside the coaching team to ensure the season ends on a high."