Demetrious “Mighty Mouse” Johnson, the legendary flyweight UFC champion, who is now fighting under the ONE Fighting Championship banner recently spent time preparing for his next fight grappling with fellow ONE FC fighter and legendary Jiu-Jitsu champion Garry Tonon. Demetrius “Mighty Mouse” Johnson is the UFC record holder in the most title defenses in history. … Continue reading Watch Mighty Mouse Roll With Garry Tonon (VIDEO)