Thomas DeCoud left the game with a head injury, and did not return. Backup Zeke Motta filled in for DeCoud, and probably wasn't a huge downgrade despite the fact that Motta was also playing with a broken hand. Surely DeCoud has a concussion, which is the logical assumption, and Motta should be able to fill in reasonably enough.
Steven Jackson left the game briefly with what may have been a groin injury, but he did return to the game, and seemed to be reasonably effective despite the injury.
Antone Smith left the game with a knee injury. ESPN.com's Vaughn McClure elaborated on the injury after the game, specifying that it was an injury to the patella, or kneecap. Smith indicated that he will undergo an MRI to determine the extent of the damage.
Falcons RB Antone Smith said he's undergoing an MRI on his knee for a patella injury.— vaughn mcclure (@vxmcclure23) December 8, 2013
Sean Weatherspoon was also sidelined early in the game with a shoulder injury, but he did return to the game. As a matter of fact, after the injury Weatherspoon intercepted a ball after it bounced off of Paul Worrilow's foot and returned it 71 yards for a touchdown. Spoon seemed winded after the fact, but it was, to be fair, a pretty long run. He seems to be okay.
All in all, the injuries to Antone Smith and Thomas DeCoud seem to be the most serious, and it's something we'll keep an eye on through the week. It seems like Steven Jackson and Sean Weatherspoon should be alright for next week's game, barring any setbacks.