In the third quarter of today's game between the Redskins and the Falcons, Washington's Robert Griffin III tried to make something happen while his team was attacking in the red zone. As RG3 approached the sidelines, he lost his footing and was absolutely clocked by Sean Weatherspoon of Atlanta. Griffin III was able to walk under his own power but the 'Skins didn't want to take any chances with their franchise quarterback, so they pulled him from the game to conduct some concussion tests. Below there is another angle of that brutal shot.    

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[via The Big Lead]