It's pretty simple what happened.
Before becoming a TUFF contestant, this Petruzzi guy was a national kumite champion, and a K-1 competitor.
Petruzzi is a skilled striker, but a sub-par Mixed Martial Artist.
If you look at his MMA record, you can see that he hasn't fought top level competition;
however, the guys he has fought in mma, only defeated him by submission.
The match makers at Elite probably didn't know about his karate and kickboxing background,
and thought they were feeding a lame TUFF reject to their money man.
Stylistically, it was a bad match-up for Kimbo.
Both fighters have limited ground skills, but Petruzzi has better standup = victory for "The Silverback"
As for the punch itself, well, Kimbo actually charged into it.
There were two factors at play: Kimbo's own momentum, and his unawareness.
He couldn't brace for it because he didn't see it coming like his youtube videos.
Scarcely anyone believes it was a fix; shit, the announcers were making all kinds of excuses for Kimbo.
"He was training specifically for Shamrock etc." lol. By all accounts, Petruzzi took this fight with 6 days notice.
It's just plain silliness. Kimbo was keeping this organisation afloat. He was the ONLY real draw.
Nobody cares about Gina Carrano except some schmoes.
As divcom said, "Elite is fucked."
I don't know if they're fucked, but this is definitely not the outcome they hoped for.
Time for the rematch.