Leeds forward Weller Hauraki has been ruled out for up to three weeks with a calf strain.
Hauraki, 27, picked up the injury in Sunday's 44-16 win over Widnes, although the positive news for him and the Rhinos is that he hasn't suffered a tear.
The Kiwi, who signed from Crusaders at the end of the 2010 season, has already begun rehabilitation with the Rhinos medical team.
He missed just three Super League games for the Rhinos last season, and was an ever present for Crusaders in 2010, scoring 11 tries.
Check out this week's betting tips in association with My Club Betting and @BetRugbyLeague.
Just how does Super League compare to football's Premier League? We look at the facts and figures.
As the League 1 Cup gets up and running, Forty-20 editor-at-large Tony Hannan has a suggestion that would also boost rugby à treize.
Castleford coach Daryl Powell has admitted that his team's emhpatic win over Wigan has lifted his mood.
Wigan coach Shaun Wane has admitted that Friday evening's Super League defeat to Castleford is the worst night of his coaching career.