[1] Cox was a reserve cornerback in 2013 season with Mississippi, in which he recorded 31 tackles and an interception in the Bulldog's overtime Egg Bowl victory over Ole Miss.
[3][4] Cox went undrafted in the 2015 NFL draft, but signed a free agent contract with the Kansas City Chiefs soon after.
[5] About 10 months after his release by the Chiefs, Cox signed with the Saskatchewan Roughriders of the Canadian Football League (CFL) in May 2016.
Following the season, on December 8, 2016, Cox and the Roughriders agreed to a 2-year contract extension, keeping him with the Riders through 2018.
[8] On May 29, 2017, the provincial court of Saskatchewan determined that Cox was found not guilty of assault causing bodily harm.