Diehard Soccer

It is a term used to define someone who lives and breathes the sport of soccer such that he has transcended from being a diehard soccer fan to the very sport of soccer itself. This individual imbues the whole meaning and spirit of the sport and is considered a 'diehard soccer' himself.

This term can be a noun and an adjective.

Have you seen Gerard around lately? He has been watching soccer day and night...
No bro... he is diehard soccer.