What is hip-drop tackle in the NFL? Why is the league considering banning it?

NFL owners unanimously approve a rule that bans the hip-drop tac

NFL considering a ban to hip-drop style tackles - Footballscoop

MSN

NFL weighing huge kickoff changes, hip drop tackle ban - The

NFL hip-drop tackle ban raises more questions than answers

NFL Likely To Ban Hip-Drop Tackles From The Game Very Soon

NFL owners unanimously approve a rule that bans the hip-drop

NFL considers eliminating hip-drop tackles, will review the 'tush

NFL owners to consider kickoff change, hip-drop tackle ban - ESPN

What is a hip-drop tackle? NFL is banning the move

Hip-drop tackle banned by NFL at league owners' meetings