Castleford Tigers have announced that recent signing Mark Edmondson has been forced to retire from the game.
Edmondson signed a 12-month deal with Castleford in October
The forward, 28, has struggled with injuries over the past two seasons, but was hoping to put those behind him.
"This is a disappointment for the club but a much bigger blow for Mark," said Tigers football manager Michael Robinson in a statement.
"He had hoped to make a fresh start but that isn't to be and we wish him well in whatever the future holds for him."
Edmondson took the decision after failing a stringent club medical, having signed at the end of October from relegated Salford.
The former St Helens forward had agreed a 12-month deal with the Tigers and was confident his injury troubles were behind him.
"The injuries seem out of the way and I'm looking forward to pre-season," he said at the time.
"It's almost like a fresh start for me and another chance so I'm determined to go for it."
Edmondson spent eight seasons with Saints and also had a year with the Sydney Roosters in Australia's National Rugby League in 2006 before joining Salford.