If Jack knocks Tyson out, no one will notice because he is an old man, so Tyson wins; if Tyson knocks him out, Tyson also wins. No script is going to save Jack in this situation.
This is like the scene in GoT:
Oh! I don't want to fight you, Jorah the Andal. What do I have to gain? If I win, I'm the shit who killed an old man. If I lose, I'm the shit who was killed by an old man.
This is one of all those hype events I don't really want to bet on it even as a free bet, it is scripted from the strat, everything seems so fake and cringe about it and even if I see on of them KO the other with a clear punch and the other guy not moving for a minute I won't stop thinking it was a setup. And for these odds, even if it were 3:1 simply not worth the risk.