Collingwood could regain Chris Tarrant and Nathan Brown this week after fellow key defender Lachlan Keeffe became the AFL club's fourth serious knee injury this year.
The Magpies are expected to confirm that Keeffe will need a season-ending reconstruction after being stretchered off in Saturday night's big away win over Adelaide.
He will join teammates Andrew Krakouer, Brent Macaffer and Luke Ball as "reco" casualties.
But captain Nick Maxwell said on Sunday that Tarrant (calf) and Brown (knee) are chances to return on Sunday against winless Gold Coast.
"'Tazza' and Nathan Brown will both be up for selection this week, so it will just be a matter for the conditioning staff to have a look at them," Maxwell told Channel Seven's Game Day.
"Hopefully they do come back, because I'm the smallest key defender in the league at the moment."
On Sunday, Melbourne veteran Brad Green was taken to hospital with a bruised lung after a heavy collision with Carlton youngster Josh Bootsma.
The scans have cleared him of any serious damage," Melbourne coach Mark Neeld said.
"He just needs to be monitored regularly. We'll just see how he is in the early parts of the week.
"The fear was he had some type of lung problem so they went and scanned it and it's nothing too serious. He's pretty sore."
Star Brisbane midfielder Simon Black was subbed out of Sunday's loss to North Melbourne after he suffered knee soreness in the warm-up.
Black tried unsuccessfully to play through the pain but Lions coach Michael Voss is confident the Brownlow Medallist will not miss any games.
St Kilda coach Scott Watters confirmed that utility Jarryn Geary had suffered a facial fracture during Saturday night's outstanding win over Sydney.
Geary was helped from the field with a bloodied face after a collision.
But the Saints hope he will be available for Friday night's match of the round against Richmond.
"It is a fracture, just in the orbital region, but it looks like being something that potentially he'll be able to play this week," Watters said.
"He's a strong chance now."
Essendon's well-documented injury woes continue, with Kyle Hardingham a late withdrawal from the Saturday night win over Greater Western Sydney because of calf tightness.
Ricky Dyson was subbed out of the match and there is speculation he has a groin injury.
In-form forward Stewart Crameri also looked sore towards the end of the match.
Dustin Fletcher (groin) and Dyson Heppell (knee) missed the match.
GWS star Israel Folau was another late withdrawal because of a hamstring injury.