By Chris Emma–

(CBS) The Bears will be without top receiver Alshon Jeffery for the sixth time this season and will have to find stability in the defense without middle linebacker Shea McClellin when they face the Bucs on Sunday afternoon.

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Jeffery returned from a calf injury last week, only to catch a touchdown and injure his hamstring against the Vikings. He has also dealt with injuries to his calf and groin this season.

Following Chicago’s loss in Minnesota last week, McClellin was diagnosed with a concussion after experiencing symptoms. He hasn’t been cleared through the NFL’s concussion protocol. Christian Jones will start in McClellin’s place.

The Bears’ full inactives list also includes Bryce Callahan, Nick Becton, Jacoby Glenn, Tayo Fabuluje and Bruce Gaston.

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Former Bears safety Chris Conte is listed as one of the Bucs’ inactives, meaning he will be replaced by another former Bears safety, Major Wright.

Kickoff between the Bears and Bucs in Tampa Bay comes at noon.