Castleford stand-off Rangi Chase has submitted a transfer request.
The 27-year-old England international has been heavily linked with a move to Brian Noble's Salford, as well as a return to the NRL.
Chase has made 23 league appearances this season, scoring five tries.
In a statement the club said: "Castleford Tigers can confirm Rangi Chase has submitted a transfer request. The club will make no further comment at this time."