re: Most impactive college football rule change

Legal holding...In the 1970's today's blocking techs would get a flag every play. Hands extended was not allowed...

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There's no question that what changed the game most were the rules relating to clock management, timeouts, and substitutions.

The game transitioned away from having lean players in good cardio shape to having a bunch of pudgy big guys (even the RBs) trained for short bursts of power.

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Excellent analysis

I miss the days of cardio-athletes on the field.

Of course I date from the late fifties - was there with the advent of the Chinese Bandits. This is the brand of football I most admire.