In the latest in an occasional series of videos to explain rules, NFL vice president of officiating Dean Blandino examined the crown-of-the-helmet rule Friday.
He also said Kansas City Chiefs running back Jamaal Charles was not called for a crown-of-the-helmet hit Thursday night because it was within 3 yards of the line of scrimmage. The new rule only pertains to outside of the the tackle box.
Blandino also discussed kicking game issue and safeties.
-- Bill Bradley, contributing editor