Castleford three-quarter Josh Griffin has played his last match for the Tigers after completing a return to rugby union.
The 22-year-old former Huddersfield and Wakefield winger has been released from his contract by Castleford to enable him to join championship club Leeds Carnegie.
Griffin, who has scored 14 tries in 21 appearances for the Tigers this season, will move to Headingley, where his older brother Darrell plays for Leeds Rhinos, on a two-year deal with immediate effect.
"It was a big decision for me to move away from Super League, having broken through in recent years, but I am excited about what Leeds Carnegie are doing," said Griffin, who is from Oxford and grew up playing rugby union before switching to league.
"It will take me a while to get up to speed with the game but I played union growing up down south so I am sure it will come back pretty quickly."
Meanwhile, Castleford, who finish the season at Hull on Saturday week, will have a host of players making their last home appearances against Catalan Dragons on Sunday.
Danny Orr, Ryan Hudson and Nick Youngquest, who are all retiring, and Stuart Jones will be making their last appearances at the Probiz Coliseum and the match could also mark the penultimate appearances of prop Paul Jackson and stand-off Rangi Chase, who remains a target for Hull.
"It will be a particularly emotional day on Sunday with seven players not contracted to the club for 2013 and some playing the last home game of their careers," said coach Ian Millward.
"We hope to give them all the send-off they deserve."
Chase and hooker Daryl Clarke are set to return from injury and half-back Jamie Ellis will be back from suspension as Millward's men look to end a run of five consecutive defeats and avoid the wooden spoon.