Will Barthau underwent successful ankle surgery on Thursday to reconstruct lateral ligaments which had ruptured in training two weeks ago.
Barthau will be out of action for 12 weeks, but should return before the end of the 2016 season.
“We’re very pleased that Will’s surgery went well,” said head coach, Andrew Henderson.
“He’s in the best hands he can be with our medical team, who’ll support him every step of the way in his rehab.
“We look forward to welcoming him back to training when he’s ready, and wish him a speedy recovery.”