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CHICAGO (AP) -- Bears quarterback Jay Cutler had to leave with a knee injury in the third quarter of Sunday's NFC championship game against Green Bay and was questionable to return.

He was replaced by Todd Collins with Chicago trailing 14-0.

It was not clear which knee Cutler injured or when it happened.

Cutler was having a rough afternoon, going 6 for 14 with 80 yards and an interception. Collins has played sparingly this season.

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