The Brisbane Lions will be without Dayne Zorko for Saturday’s blockbuster against ladder leaders Port Adelaide at the Gabba due to a calf injury.

High performance manager Damien Austin said scans have revealed the Lions skipper has a minor calf strain that could see him miss multiple games.

Zorko had overcome a similar problem to return to the side for Sunday’s win over the Crows after missing the round three win over West Coast but was unable to finish the game.

“It will be two or three weeks,’’ he said.

“Hopefully we’ll get him back soon as there’s not too much damage there.

“It was disappointing throughout the game, but he did all the training and hit all the measures that we needed him too to tick the boxes.’’

The news is better for veteran ruckman Stef Martin with Austin saying an increase in running has him on the brink of a return this week against the Power.

“He had a bigger session today and a big session on Saturday,’’ he said.

“So hopefully we’ll get him up to speed to sprint on Thursday and do a full training session and hopefully he is available,’’ he said.

That would leave Marcus Adams as the only player joining Zorko on the injury list.

The defender is still experiencing discomfort from foot surgery and has yet to resume running.

“Marcus isn’t probably a bit slower than what we thought,’’ he said.

“The pain in his foot is taking longer so we will wait for that to dissipate and we’ll progress then.’’