How would Muhammad Ali do in today's Light Heavyweight division?

[fries in the bag]

He had a fight weight around 212 pounds, much lighter than Heavyweight.
But is considered by many to be the greatest heavyweight boxer in history.
Talk about pound-for-pound.

Would he dethrone the likes of Alex Pereira, even with just Ali's superior boxing?
Or would MMA fighter's well-rounded skillset overwhelm Ali's pure boxing?

 

[jeff7b9]

That was the size of heavyweights up until the 1990s.

Same decade that Mark McGuire hit 70 home runs breaking a record that stood for 30+ years.

What changed??? Hmm.