Griffin left Sunday's game in the third quarter and did not return.
Team spokesman Tony Wyllie says Griffin was examined by an independent neurologist before being sent home from the team's stadium and will be evaluated again Monday. Wyllie adds Griffin got a cut on his chin.
The Heisman Trophy winner and No. 2 overall pick in this year's draft was slammed into by Falcons linebacker Sean Weatherspoon's side on a third-and-goal play with about six minutes left in the third quarter.
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