Biggest Defensive X-Factor for Panthers to Beat Broncos in Super Bowl 50

Much of the praise for the Carolina Panthers' fantastic season has gone to Cam Newton, and rightly so, yet their defense has been just as instrumental in leading them to Super Bowl 50.

Who is the biggest defensive X-factor for the Panthers in the upcoming showdown with the Denver Broncos?

Watch Adam Lefkoe and Bleacher Report NFL Analyst Chris Simms discuss in the video above.