Green Bay Packers outside linebacker Clay Matthews could miss Sunday's NFC Northern Division season-finale against the Chicago Bears after suffering another injury to his right thumb.

The 27-year-old re-injured his thumb during last weekend's 38-31 defeat to the Pittsburgh Steelers - and was subsequently forced to leave the pitch.

And the Packers' head coach Mike McCarthy is not feeling overly optimistic that the LB will be fit to play this weekend.

"The training staff didn't feel very good about the injury," coach Mike McCarthy told reporters on Monday. "So we're still working through the process."

Aaron Rodgers, the Packers' quarterback, is still recovering from a broken collarbone and is not expected to be fit in time for Sunday's fixture, while McCarthy is also sweating on the fitness of rookie running back Eddie Lacy, who is struggling with a sprained right ankle.

"Eddie, he's sore, which he has been pretty much the whole season," McCarthy added. "We're not going to practice on the field until Thursday, so I'll probably have a better feel for where he's at [then]."

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