And when putting an open hand on a defender while blocking was an illegal use of hands call. You saw a lot fewer of those arm-around-the-neck holds then because blockers kept the elbows up, hands closed close to the body and made contact with shoulder and forearm.
I would love to see the teams of today play with the rules of yesterday against a team from yesterday. It would be no contest.
Next big thing for the NFL is to put flags on the quarterback.