The Scarlets have signed Scotland international flanker John Barclay from Glasgow on a three-year deal.
The 26-year-old said: "I am really looking forward to moving to the Scarlets next season. Having seen the ambition they play with, the style, rugby philosophy and tradition of such a great rugby region, I know that it will be a great move for me."
"It's going to be an exciting opportunity for me to experience a new environment in West Wales. It will be good to be part of a team that has so much talent, potential and energy with a mix of key world-class players along with world class playing and training facilities."
Scarlets Head Coach Simon Easterby said: "We are very pleased to have signed John. He will add real value to our group both in terms of his own exceptional ability and experience but also will be a great mentor to a number of our younger back-rowers coming through the system."