I couldn't identify just one, but there's numerous rule changes and points of emphasis that have reflected a change on the field almost immediately. It's hard to avoid the horse-collar tackle, for example, but the players understand why the rule is in there - because of the injury rate prior to us making that a personal foul.
From Jeff Fisher
I had this moment in church, which I think really turned me off. I was 7 or 8 years old and I was sitting at church, and we happened to be playing with the sunlight that was coming down from the stained glass window, and the monsignor came down to the pew and grabbed us by our neck collars and said, 'I'll deal with you.'
From Jeff Fisher
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