I think the title should read "Joey Haddad destroys a guy with one sucker punch."
That was cheap, plain and simple. Instead of coming up fighting, he flops like a rag doll and acts like he is hurt or won't fight. Then when the linesman and another player come to separate them, he blindsides the guy. If he had done that face-to-face, it would have been impressive. Instead, it comes across as cowardly.