Jones won two Wales caps last year

The 27-year-old former Wales Under-19 captain has been recruited as a replacement for Wales second row Ian Gough, who has joined the Ospreys.

Swansea-man Jones, who stands at 6ft 7ins and 18st 1lb, won two caps in last year's Six Nations, as a replacement against England and Scotland.

"He's a quality player. I knew him from his time in England with Harlequins and Saracens," said coach Paul Turner.

"He was a young 19-year-old then and it's ironic our paths cross again now eight years later.

"He came through the system, captaining Wales Under 19s, his knowledge of forward play is good, he's a ball carrier and he can run a line-out.

"It was a tough call whether we went overseas for a lock, but we have remained true to our beliefs that we should develop local players."

The Dragons had been linked with two forwards from South Africa and two Russian international forwards.