Wakefield captain Danny Kirmond faces a month on the sidelines after undergoing surgery on a knee injury.
Kirmond, 27, sustained the injury in Sunday’s 18-16 defeat to former club Huddersfield.
Head Coach Richard Agar said: “Danny is having an operation on a cartilage today. It’s going to rule him out for three to four weeks.
“It’s a big blow because he’s become a very important player for us and we’ve not got the biggest squad. He’s got that line breaking ability and he’s really grown into the captaincy.”
However, Agar has been boosted by the news that Reece Lyne‘s injury isn’t as bad as first feared.
The 20-year-old damaged a pectoral muscle in the win over London Broncos.
Agar added: “We thought he had torn it and were looking at six months but the specialists is very happy that it’s started to heal itself already.
“We’re expecting a two to three week lay-off, which is better than we first feared, but it’s still a blow for the kid because he was playing very well and had anchored a place in the team.”
Wakefield travel to France to face Catalan on Saturday.