Joe Rogan spoke about what still ties him to the UFC. UFC color commentator Joe Rogan has revealed that he may leave the UFC if Dana White retires. Rogan, who has been with the UFC for 25 years, is considered one of the best commentators and analysts in mixed martial arts, having called some of the greatest fights in UFC history since making his commentary debut at UFC 37.5 in 2002. The lifelong mixed martial arts fan and former taekwondo practitioner has always had a great relationship with White and doesn’t think the UFC would be the same without him.…