Bradford Bulls, who have recently lost Elliot Kear and Craig Kopczak to injury, have been told that Ian Sibbit needs a shoulder operation and will be out for around 12 weeks.
Warrington will be without Brett Hodgson at Leeds tomorrow night. Their full-back and goal-kicker has injured his back. St Helens, at home to Hull tomorrow, will be without James Roby for three matches, due to a thigh injury. Mark Flanagan has a similar problem but Josh Perry is fit to play.
The Wigan back-row forward Jack Hughes has been given a contract extension to the end of the 2014 season.