Getty Bears head coach Ben Johnson. The Chicago Bears are expected to sign a former Las Vegas Raiders running back to their roster amid injury uncertainty with prospective back Roschon Johnson . According to CBS Sports’ Matt Zenitz , the Bears are signing 2022 seventh-round pick Brittain Brown to their running back room after hosting him and several other backs — including veteran Jamaal Williams — for workouts last Saturday at training camp. While the Bears have not yet announced Brown’s