The Ospreys have announced the signing of prop Cai Griffiths, who returns to the Liberty Stadium on a one-year contract ahead of 2014/15.
The Bangor born 30-year-old played 123 games for the region during his 2003-2012 stint before he moved on to London Irish that off-season.
Griffiths did return to the Ospreys on loan in 2012/13 but is now back on a full-time contract after leaving London Welsh for the PRO12 side.
Recruitment and Retention Manager, Andy Lloyd said: "It's positive news for us in that he is someone with bags of experience in a key position, who will be available to us all season."
"He knows, understands and values what it means to be an Osprey and what is expected of anyone who wears the jersey."