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It’s uncertain how healthy the Green Bay Packers’ roster will be when they travel for Sunday’s game at the undefeated Carolina Panthers.

Cornerbacks Sam Shields (shoulder) and Quinten Rollins (neck), as well as receiver Ty Montgomery (ankle), were listed as questionable on the team’s injury report Friday.

Montgomery has been able to practice on a limited basis this week, while Shields and Rollins did not. McCarthy said Shields, the Packers’ top cornerback, is “getting better” but still must make progress if he can be on the field Sunday.

McCarthy hopes Shields can play against the Panthers. He said Shields would not have to practice Saturday to be activated on the 46-man game day roster.

“Sam’s a veteran,” McCarthy said. “I would say I would not need him to participate (Saturday) because we have history together. But there’s hoops you’ve got to jump through, and he has not done that yet. So it’s clearly in the hands on the medical team right now.”

The best news for the Packers was inside linebacker Clay Matthews’ status. Matthews (ankle) was listed as probable on the injury report, along with outside linebacker Nick Perry (shoulder/hand) and fullback Aaron Ripkowski (illness).

rwood@gannett.com and follow him on Twitter @ByRyanWood