Chris Carson didn’t know it was fourth down until after the play.
He didn’t know it when Russell Wilson took a shotgun snap and stuffed the football between Carson’s arms at San Francisco’s 1-yard line. He didn’t know it when defensive tackle D.J. Jones plunged his 321 pounds of body weight against him like an iceberg at the line of scrimmage. He didn’t know it when he shook Jones off, trudged to his left and felt linebacker Elijah Lee swallow his right leg like a bear trap at the 2-yard line. He didn’t know it when left tackle Duane Brown shoved him from behind and helped Carson drag Lee across the goal line.