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Vernon Davis: (Concussion) Optimistic For Sunday
Update: Davis is not optimistic about his chances to play in the 49ers' final game of the season against the Arizona Cardinals on Sunday, the San Francisco Chronicle reports.

Recommendation: Davis, who sustained a concussion after a crunching hit by Seattle safety Kam Chancellor on Sunday night, wore a black non-contact jersey again during Friday's practice. He must clear a simulated contact test before receiving clearance to take the field against the Cardinals. He did not sound confident about playing during his media session after practice and is still being listed as questionable. If he doesn't suit up, Delanie Walker becomes a very nice play here in Week 17.

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