SportsDash: NFL head-shot rules actually putting knees in danger?

Matt Grassie
NBC on Yahoo! Sports

In the wake of Dustin Keller's nasty knee injury, NBCSN football analyst Shaun King had some interesting thoughts concerning the reasons for D.J. Swearinger's low tackle. With the new rules prohibiting tackles that target a player's head, King believes leg injuries will skyrocket as defenders aim lower on ball-carriers.

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