Houston Texans safety D.J. Swearinger's concussion-inducing hit on Denver Broncos wide receiver Wes Welker has become a controversial topic.
Was Swearinger's hit illegal? Did Peyton Manning make a mistake by giving him an earful? How hard is it for a defensive player to adjust to the NFL's tackling rules?
Watch as Adam Lefkoe goes in-depth with Jonathan Vilma and Bleacher Report NFL Analyst Chris Simms in the video above.