On May 11, 2015, Cox signed with the Carolina Panthers.[3] On September 5, 2015, he was released by the Panthers.[4] On September 7, 2015, Cox was signed to the Panthers' practice squad.[5]
On February 7, 2016, Cox's Panthers played in Super Bowl 50. In the game, the Panthers fell to the Denver Broncos by a score of 24–10.[6]
On August 30, 2016, Cox was placed on injured reserve.[7] He was waived from injured reserve on September 6, 2016.
^Levine, Ben (April 9, 2017). "The Spring League Announces Camp Roster". profootballrumors.com. Archived from the original on July 26, 2017. Retrieved July 25, 2017.{{cite web}}: CS1 maint: bot: original URL status unknown (link)
^"TRANSACTIONS". cfl.ca/. Archived from the original on November 6, 2017. Retrieved November 5, 2017.{{cite web}}: CS1 maint: bot: original URL status unknown (link)