By Mark Maske | The Washington Post
When the NFL acted swiftly in March, with little to no advance warning, to put in place its new safety rule about a player lowering his head to deliver a hit with his helmet, league leaders hailed it as a major development with broad and significant implications for safeguarding players. But they also knew there would be considerable consternation surrounding the arduous process of actually putting the rule into effect.
They were oh-so-right about that.