NFL football commissioner Roger Goodell delivers a Dean’s Distinguished Lecture at Harvard School of Public Health in Boston, Thursday, Nov. 15, 2012, where he discussed some of the rules that have been created to limit concussions in the game of football. Goodell said the league will do what it needs to do to protect the safety of its 1,800 players. (AP Photo/Elise Amendola)

Associated Press
NFL football commissioner Roger Goodell delivers a Dean’s Distinguished Lecture at Harvard School of Public Health in Boston, Thursday, Nov. 15, 2012, where he discussed some of the rules that have been created to limit concussions in the game of football. Goodell said the league will do what it needs to do to protect the safety of its 1,800 players. (AP Photo/Elise Amendola)
NFL football commissioner Roger Goodell delivers a Dean’s Distinguished Lecture at Harvard School of Public Health in Boston, Thursday, Nov. 15, 2012, where he discussed some of the rules that have been created to limit concussions in the game of football. Goodell said the league will do what it needs to do to protect the safety of its 1,800 players. (AP Photo/Elise Amendola)
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