Bellator phenom Michael Page is on a tear through the world of combat sports. In his mixed martial arts career, "Venom" Page has not faced a loss. Accruing a record of 12-0, the MMA all-star has become a tough opponent for any fighter. Now Page can add boxing to his list of accomplishments. Michael Page just made his boxing debut inside the O2 Arena in London. Facing off against Jonathan Castano, who is now 2-12-1, Page put on a dominant performance over his opponent. In the end, Page put his opponents lights out with a stunning knockout victory. The boxing match made it to the third round, before things went terribly wrong for Castano. With a devastating right hand, Page put an end to his debut with a dazzling knockout display that can be seen in the video above.