Leeds Rhinos centre Keith Senior has been ruled out for the rest of the season with a knee injury.
The 35-year-old former Great Britain international has cruciate ligament and cartilage damage following Friday's 40-20 Challenge Cup win over Harlequins.
Senior will have an operation at the start of June but is out of contract at the end of the season.
The injury is not thought to be as serious as those suffered by team-mates Jamie Peacock and Danny McGuire.
"I was devastated after the specialist confirmed the worst news," Senior said.
"The injury is similar to the one that Kallum Watkins had last year and he was back in training after four months so that is my immediate goal after the surgery.
"Hopefully everything will go well and my aim is to return to playing next season."
Head coach Brian McDermott added: "First and foremost, our thoughts are with Keith. He has been outstanding for us this season both on and off the field.
"We will make sure he gets the best possible medical care and our medical staff have a good track record in getting players back from this sort of injury."
Senior joins Rhinos backs Brent Webb, Ben Jones-Bishop, Kallum Watkins and McGuire on the current list of injured players.