SEA Eagles veteran Steve Menzies was last night declared a certain starter for Saturday night's clash against the Cowboys after returning from quarantine and training with the team yesterday.
The star forward was in doubt for the match after he was struck down by a virus over the weekend.
Menzies was placed in isolation for 48 hours with concerns the virus may spread throughout the team.
The 33-year-old had been suffering from diarrhoea and vomiting.
"The doctor said it was just a 48-hour bug," Menzies said.
"I wasn't well over the weekend but I am fine now. I'll definitely be playing."
Menzies rejoined his teammates at Narrabeen yesterday for a field session and weights after being passed fit by club doctors.
Sea Eagles CEO Grant Mayer said the team had been buoyed by Menzies' return. "He has been a key part of our team for almost 15 years," Mayer said.
"And the last six weeks he has been invaluable. He has been in fine form and his try-scoring form will be required on Saturday night.
"It is a very important week for the club and it we need someone of Steve's experience around at training.
"His presence around the other players is very important for us."
Mayer said Menzies was placed in quarantine as a precaution - with fears the virus may derail the team's premiership campaign.
"We have all had these sorts of things and they aren't pleasant," Mayer said.
"It is not ideal before a massive game. As soon as one gets it - it can spread. It is better to be safe than sorry but it is good to have him back."