Robert Griffin III is getting a chance to revive a career that once seemed unstoppable. One of the NFL's brightest and flashiest stars just a few years ago, Griffin signed Thursday with the Cleveland Browns, a franchise on a perpetual mission to find a quarterback to bring it back to glory. Griffin hasn't been the same since his dazzling rookie season in Washington in 2012, but the Browns are taking a chance he can still lead on and off the field.