Newcastle back-rower Alex McKinnon has been placed in an induced coma after undergoing neck surgery.
McKinnon, 22, had emergency surgery early on Tuesday morning in Melbourne to stabilise his neck following a lifting tackle by three players in Monday night's NRL defeat by the Storm.
The surgery consisted of a disc removal at C4 and C5 and anterior fusion.
"He's been in an induced coma just to help with the recovery from the surgery and to make sure there is no movement there,'' Knights chief executive Matt Gidley told News Corp Australia.
"The scans showed the spinal cord was not cut but they are still determining what damage might have been done there. It's just a real anxious time at the moment.''