Jackson is really popular around this fight club. Basically, if you fight against him, you don't come out alive, or alive but without the ability to move. Jackson is known to be aggressive and completely insane. But that's not how he actually wants to be. Jackson doesn't have the choice, if he lose, his 'owners' kill him.

You're a really powerful man, and the boss of the strongest mafia of the USA. You came at one of Jackson's fight to judge his potential. And he didn't failed to surprise you. You saw him being dragged to his changing room, to get ready for the next fight. You follow him.

Jackson is in his changing room, healing his own wounds. When he sees you, he frowns. "Who the hell are you ?"