Penrith second-rower Liam Martin could line up as soon as Thursday night after scans cleared him of a serious ankle injury.
Martin's season appeared in doubt when he landed awkwardly on his ankle in the second half of the Panthers' loss to Melbourne on Thursday.
The State of Origin representative played no further part in the game and wore a moon boot post-match.
The Panthers initially suspected a long-term injury and were bracing for the possibility of making a run at consecutive premierships without their first-choice right second-rower.
But Martin has since been cleared of serious damage and was able to run 100 metre sprints unassisted at training on Sunday.
He has a slight limp and remains in doubt for Thursday night's match against in-form South Sydney.
Dylan Edwards, who missed the 16-0 loss to the Storm with a sternum injury, is a chance of returning for the game after training at fullback on Sunday.
Winger Taylan May is likely to need at least another week to recover from a shoulder injury but is no longer wearing a sling.
