Hooker Andi Kyriacou has been forced to retire because of injury and has joined the Cardiff Blues coaching staff.
Kyriacou, 30, joined the Blues last summer, but suffered a prolapsed disc after playing just five times for the club following a move from Ulster.
The former Saracens man underwent surgery before Christmas but he has not been able to make a full recovery and has retired on medical advice.
"Unfortunately I've failed to recover from the prolapsed disc I suffered and have had to retire following advice from the medical team," said Kyriacou, who will help coach the Blues pack.
"It is really frustrating as I came to the Blues with the intention of working to establish myself as a regular first team player and wanted to make a real impression. So it's disappointing my injury has stopped me from doing this.
"I've been studying part time at Manchester Metropolitan University for a degree in sport science as I wanted to develop a career in coaching, so it's come about sooner than I expected.
"This is a great opportunity for me and I am looking forward to working with Phil and the coaching team."