Moore signed with the Falcons on Friday, Adam Caplan of ESPN.com reports.
Moore joins a receiving corp in Atlanta led by Julio Jones, Mohammed Sanu, and Justin Hardy. It seems unlikely Moore, at 32, will uproot any of the designated starters, but he could add a veteran presence on the bottom of the depth chart. Last season with the Lions, he recorded 29 receptions for 337 yards and four touchdowns.