Green Bay didn't practice Wednesday but issued an injury report as though it did. Matthews was listed as out.
Matthews got hurt during a sack in Sunday's 38-31 loss to the Pittsburgh Steelers. Matthews missed four games earlier this season after initially breaking the thumb in Week 5 in October.
Matthews looked to be in extreme pain on the sideline Sunday after the sack. Coach Mike McCarthy has described it as a "repeat injury."
The Packers had Christmas Day off. They return to practice Thursday, when the team also is expected to announce whether quarterback Aaron Rodgers is ready to return from a left collarbone injury.