MMA coach Firas Zahabi says Alex Pereira hits so hard due to using a Jack Dempsey style punch

Alex is a different breed. And he probably would have been in a force in boxing as well.

 

What Zahab is explaining here also applies to wrist and hand injuries. Guys like Floyd, Clazaghe and Malignaggi are well known examples of poor punch technique.

 

Too chinny and doesn't move his head off center line.

 

Man he'd still lay some dudes out at CW-"Bridgerweight"

 

there are cons in mma and muay thai to using head movment.

Yes it works, but sometimes it's better to develop a good kicking game and make it difficult for someone to close the gap on you.

With kicks that he has , why would he ever let a good puncher get so close for him to have to slip?

It's also key that fighters focus on what tools and tactics they want to focus on.

and he has 53 fights in mma boxing and kick boxing with 3 ko losses. How does that make him chinney?

You think you're fav boxer can fight in kick boxing and not get chinned?