York City Knights' half back Chris Thorman is likely to miss several games for the club after undergoing surgery on a broken thumb.
He played on with the injury in the Knights' win over Dewsbury in the Championship at the weekend.
Coach Dave Woods told BBC Radio York: "We don't know how long it will be (before he's fit).
"Doctors always give you the worst and they've said it could be anywhere between three weeks and ten weeks."
Woods added: "Knowing Chris he'll be wanting to be back as quick as possible."
Thorman will definitely miss Friday's game against Batley Bulldogs.
Woods said: "He had three breaks in his thumb and it was disjointed. He played on with that from the first half so it was a good effort from him and he's telling everyone too!
"Chris been playing some really good footy for us lately and I think having Anthony Thackeray there takes that pressure off him.
"It will be a loss to leave Chris out but like he said, him being out is an opportunity for someone else to step up."