Smith (concussion) has been ruled out for the remainder of Monday night's game against the Saints, Tori McElhaney of the Falcons' official site reports.
Analysis:Smith exited the contest in the first quarter after being down on the field for several minutes. An independent neurologist ruled that the outside linebacker had sustained a concussion, and he will not be allowed to return to the game. Smith will now enter the league's five-step protocol to return to full contact play.
