Patterson out "a couple weeks"?

NFL Network's Tom Pelissero reports that Falcons RB Cordarrelle Patterson could miss "a couple weeks" with the ankle injury he suffered in the loss to Dallas. Former head team Dr. David Chao believes Patterson has a high-ankle sprain based on video review. If that's the case, a couple weeks would be the best-case scenario. Plan on Patterson at least missing Thursday night's game vs. the Patriots. We'll see when he's able to return from there. His absence will leave Atlanta's backfield to Mike Davis and Wayne Gallman.