Both players have been playing local rugby league and rugby union in South Wales over the past few years.
24-year old James scored three tries last Sunday as Blackwood beat Edinburgh Eagles 28-16 in Scotland to qualify for the third round of the Challenge Cup. James will be allowed to play for the Bulldogs in their next Challenge Cup game at Oldham on the weekend of March 6/7.
Bulldogs chairman Andrew Smith said: “We’re very proud that David has been signed by the Scorpions. After his showing on Sunday, where he scored three tries for us when we beat Edinburgh Eagles in the Challenge Cup, we’re sure that he’s got a bright professional future in front of him.”
Jamie Murphy has been signed from Bridgend Blue Bulls.
Murphy has been a consistent performer with both the Blue Bulls, Wales Dragonhearts and his Welsh Premiership rugby union club Aberavon Wizards.
He made three appearances for Crusaders in Super League Reserves last season and was outstanding each time, scoring three tries, four goals and a drop goal in total.
“Jamie’s a talent,” said Bridgend Blue Bulls chairman Simon Green. “He stood above the rest last season at the Blue Bulls and he got us to the final last year when he scored a hat-trick of tries against Valley Cougars. He was unable to play in the Final, which we lost to Blackwood and we feel the result may have been different had he played. We wish him all the best for the future, he deserves this selection.”
The Scorpions are also hoping to make further new signing announcements by the weekend including a former Super League player.