Wakefield front-rower Craig Huby will be out for three to four months after suffering a shoulder injury.
The 32-year-old made his first appearance of the season in Trinity’s 24-18 defeat against St Helens last weekend but suffered a shoulder injury in the first half.
Huby, who played 22 games for Wakefield last season, will need a shoulder reconstruction.
Trinity coach Chris Chester told BBC Radio Leeds: “Craig has done a shoulder and it looks like it will be a reconstruction.
“He’s looking at three to four months, and the back end of four months is a realistic target.
“Although we lost him, it’s a position we have plenty of depth in.
“We’re a better team when he plays though. He offers a different dimension.”