Kalyn Ponga's latest concussion has cast a huge shadow over his immediate playing future, with the Knights admitting the head blow could keep him out for up to three months.
The Newcastle skipper was knocked out just 90 seconds into his team's 14-12 win over the Wests Tigers on Sunday.
Ponga looked to tackle Tigers forward Asu Kepaoa front on, but appeared to be out of cold as soon as his head clashed with that of the Tigers forward.