The RFL is to throw its weight behind Castleford in their contract row with record-breaking winger Denny Solomona.
Hull full-back Jamie Shaul has signed a two-year contract extension with the Challenge Cup holders.
Castleford are preparing to go to the High Court in their row with Sale Sharks over winger Denny Solomona.
Zak Hardaker is to join Castleford on loan from Leeds next season, after the two clubs agreed an undisclosed loan fee for the full-back.
Castleford centre Ben Crooks is to join Leigh on a season-long loan, which could pave the way for the capture of Zak Hardaker.
Castleford hooker Paul McShane has extended his stay with the club until 2019.
Castleford head coach Daryl Powell has signed a new four-year contract that will keep him with the Tigers until the end of 2020.
Castleford have rejected three offers for winger Denny Solomona and insist they expect him to report back in November.
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