Knox was originally signed by the Seattle Seahawks as an undrafted free agent on June 15, 2012.
[3] Knox was later signed to the Seahawks' practice squad for the final two weeks of the 2012 NFL season.
[4] Knox was claimed off waivers by the Jacksonville Jaguars on August 27, 2013.
On October 23, 2013, Knox was signed to the New Orleans Saints' practice squad.
[6] Knox played for the Winnipeg Blue Bombers of the Canadian Football League (CFL) from 2016 to 2017.