Wagner sprained his knee in Sunday's 51-29 win over the Lions and will get an MRI on the injury, per coach Pete Carroll, John Boyle of the Seahawks' official site reports.

Wagner was able to walk off under his own power and immediately tried to get back into the game, but Seattle's staff kept him off the field with the team up big. Carroll responded, "I don't know," when asked about Wagner's availability for next week's season finale against the Cardinals, but the results of the MRI should paint a clearer picture regarding the linebacker's chances of suiting up.

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