Jermall dropped that man to his knees. Looking like he was begging for forgiveness. Castano has a great chin too. Nasty KO.
If he had a great chin he wouldnt have been stopped by Charlo or stunned multiple times in their first fight . Its ok but far from great.
Castano faded really bad in the last fight also. If he picks up 1 of the last 3 rounds he wins their first meeting. Its not easy to fight and fend off a big guy like that for 12 rounds.
You can't fight stylistically like him and not have a good chin. Getting stopped in a war doesn't point to a bad chin.
Castano has a good chin for sure. But him crumbling was inevitable with the non-existent defense and nothing to wear Charlo down.