Knox started his career with his hometown team, before moving to
Clyde in 1987. Knox was a part-time player, combining his football career with his duties as a
postman. This led to him being given the nickname "The Postie". Knox regularly did his shift as a postman in
Stranraer, before travelling to
Cumbernauld for Clyde training. This dedication for 10 years made him a firm favourite amongst the Clyde fans. He was the club captain for the latter years, and was awarded a
testimonial against
Rangers in 1997. Knox also played in the first ever game at
Broadwood Stadium in 1994. After 10 years good service, Knox left Clyde and returned to his first club and hometown team, Stranraer. He stayed there for 4 years, before moving to
Alloa Athletic. He had spells at
Gretna and
Stenhousemuir, before dropping out of the
Scottish Football League, to take up a player-manager role at
Wigtown & Bladnoch. ==Management and coaching==