And players were smaller and slower back then too with less rules to hurt defenders today. Today Ray Lewis plays against guys who are stronger, bigger, faster than most of the players back then. The rules today favor offense so much that its harder to be a defender now than it was when those guys played. Factor in leadership and there might never have been a MLB quite like Ray. You guys are boasting about the past like the above user without thinking about how much different it is now.
Players were tougher back then too.
Plus, those linebackers racked up tackles and such while playing in an NFL that catered much more to running. That is more opportunities for tackles. Ray Lewis had to play in the passing era so he had less opportunities to make plays at the line of scrimmage like some of those older guys.