The Joe Rogan Experience Intro - 'Train By Day..' Origin Story

'TRAIN BY DAY'... The Origin Story

The famous tagline, which has now been heard billions of times throughout the world was originally spoken by UFC legend Nick Diaz following his unanimous decision win over former UFC lightweight champion B.J. Penn at UFC 137 on October 11, 2011.

It was then used for the first time in the show's intro October 30 of the same year on Episode 153 of The Joe Rogan Experience with guest Joey Diaz.

The rest as they say... Is history.