Dragons winger Matthew Pewtner has been forced into immediate retirement on medical grounds.
The 25-year-old failed to recover from a concussion that he sustained during the Singha Premiership Sevens last year.
“I am devastated that I have been forced to retire from rugby through injury," Pewtner told the Newport Gwent Dragons website.
“It has been very difficult to come to terms with retiring but I know that it is the right decision for me and my health.
“I have been playing rugby since I was seven years old and to think that I can never play again is quite upsetting.
"Not only is it my job, rugby has played a really big part of my life.
"I have had many highlights throughout my rugby career, one of which being, taking the win against Stade Francais in Paris and the other was reaching the Hong Kong Sevens final against Fiji."
Dragons Director of Rugby Lyn Jones also commented on the young winger's disengagement.
“It saddens us all to hear that Matthew has been forced to retire through injury," he said.
“We are all grateful for Matthew’s fantastic contribution to the team throughout the years he has been with the Region; he will be missed on and off the field.
“We wish him all the best for the future.”
The Welsh Region player represented the Wales U16 and U20 teams, and also featured on the international Sevens circuit. He played a crucial part in the Dragons Sevens squad's cup-winning performance at the 2015 Premiership Singha Sevens Final.