Leeds will also be without fellow flanker Jacob Rowan, who is on England under-20 duty, as they look to get back to winning ways after their defeat at Doncaster Knights.
Key added: "The danger is that we apply too much empathises and put too much unnecessary pressure on ourselves. It's another game.
"What the defeat has done is given us a kick up the bum and rightly so.
"The players still recognise the ability they have. We haven't become a bad team over night and the danger is that people start to think that.
"What this has done is bring a greater resolve and greater strength to the squad. We still know that it is in our hands to go back up."
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