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Bob Wojnowski and Justin Rogers look ahead to this weekend's game with the Bears. Detroit News

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Allen Park — The Detroit Lions continue to battle injuries up front. The team was down four starters, including three offensive linemen during Tuesday’s practice.

Right tackle Rick Wagner continues to be sidelined with the ankle injury he suffered against the Baltimore Ravens. Guard T.J. Lang is missing practice time for the third consecutive week with a foot injury, although he’s started the past two games.  And it was announced Swanson had reported concussion symptoms following the team’s victory Sunday over Tampa Bay.

If Wagner remains out, Corey Robinson likely will start at right tackle. And if Swanson can’t clear protocol before Friday, the Lions will move Graham Glasgow to center and likely plug Joe Dahl in at left guard.

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Dahl was activated off injured reserve last Saturday, before the Bucs game.

Additionally, cornerback Nevin Lawson sat out with an illness. Defensive end Ziggy Ansah (ankle), Robinson (foot) and offensive tackle Taylor Decker (shoulder) were all limited.

jdrogers@detroitnews.com

twitter.com/Justin_Rogers

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