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

Sunday's Super Bowl 50 matchup features two of the best units in all of football this season, as the Carolina Panthers offense squares up against the Denver Broncos defense. 

Which X-factor on the Panthers offense needs to step up in order for them win Super Bowl 50?

Watch Adam Lefkoe and Bleacher Report NFL Analyst Chris Simms reveal their X-factor in the video above.