Question: Bump and run coverage is a strategy often used by defensive backs in American football in which a defensive player lines up directly in front of a wide receiver and tries to impede him, which formercornerback, five-time Pro Bowler and a 1989 Pro Football Hall of Fame inductee of the Pittsburgh Steelers, specialized in this coverage to such a point as to cause a rule change?
Sentence (from "Bump and run coverage"): This originated in the American Football League in the 1960s, one of whose earliest experts was Willie Brown of the Oakland Raiders.
Relevant evidence: No