Castleford sign Aussie Grehan - Rugby League - More Sports - The Independent Castleford have completed their squad for the new Super League season by signing the Australian centre or back-rower James Grehan on a one-year contract. The 23-year-old, who has been playing in France for Limoux, was recommended to the Tigers by their former player Dale Fritz, a coach at his previous club, Western Suburbs, in Sydney.