The Newcastle Knights finalised Round 15 preparations in chilly conditions at Hunter Stadium on Saturday morning.
Coach Rick Stone has called in Danny Levi and Jake Mamo to be on standby for Sunday's match against the Cronulla Sharks.
It will cause a reschuffle for the NSW Cup Knights, who take on the Wests Tigers on Saturday at Campbelltown Stadium.
The final 17 will be confirmed one hour before kick off on Sunday.
