How it will impact player health and safety:Atlanta Falcons president Rich McKay, chairman of the NFL Competition Committee, said after the rule passed: "We really think the time has come that we need to address the situation in space when a runner or a tackler has a choice as to how they are going to approach the opponent. We are going to say that you can't make that choice ducking your head and delivering a blow, a forcible blow, with the top crown of your helmet. We are trying to protect the runner or the tackler from himself in that instance."