Newcastle forward Jacob Saifiti could miss the start of the NRL season after breaking his leg in an off-field incident at the weekend.
The Knights on Monday confirmed Saifiti was rushed to hospital early on Sunday morning after being punched and falling awkwardly.
The club is yet to sanction Saifiti and left the matter to police.
The Newcastle front-rower was reportedly drinking with teammates before being involved in an altercation with the brother of Sydney Roosters and Australian captain Boyd Cordner.
Cordner's brother Dane is believed to be playing football in the local league for Central Newcastle, who were celebrating a teammates' engagement.
A number of Knights players were said to be farewelling teammate Luke Yates at the same hotel before Saifiti and Dane were kicked out by security after a verbal altercation.
Dane allegedly punched Saifiti outside.
"Having fallen awkwardly as a result of the punch, Saifiti injured his leg and was transported to hospital by security staff," the Knights said in a statement.
"The matter is now with the police. Given the facts, Saifiti may be subject to disciplinary action taken by the club at the appropriate time."
Saifiti is regarded as a promising talent at the Knights after making his debut in 2016.
Shoulder injuries limited him to just eight games last season and he could fall down the pecking order with the recruitment of Tim Glasby and David Klemmer.
