Sculthorpe has had three years with Wigan having joined from Rochdale Hornets ahead of the 2002 season.
Coach Ian Millward said,
"There are two reasons why Danny is going on loan to Castleford. Firstly we must remain within the salary cap and also we have recruited several players for next season. We should also have the return of a number of players who were injured for most of last season, most of whom were forwards.We want Danny to play regular first team football and Castleford provides that opportunity. He is still contracted to us for the 2007 season and we hope to have him back in our side during that year."
Speaking to castigers.com, Danny said,
“This is a different challenge for me and I’m looking forward to it, and I’m looking to playing more regularly on a week-by-week basis. It will be my first club over the Pennines in Yorkshire and I’m joining a big club with a great following. I know that the town is passionate about rugby, Castleford to me are a Super League club and I’m looking forward to playing my part in making their return to the top flight a successful one.”
In 2005 Sculthorpe made six starts and appeared as a substitute in 16 games, scoring two tries.