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?
Bump and run coverage:  Mel Blount of the Pittsburgh Steelers specialized in this coverage to such a point as to cause a rule change (see below) to make it easier for receivers to run their routes and increase scoring.
i don't know