Joseph Parker's Chin and Engine.

I agree generally with your assessment of Ruiz Jr, etc.

However, having followed Parker for a long time, he really does have a solid chin. That's based on seeing many fights and Parker has got hit by some pretty heavy shots, e.g. Bergman (admittedly not a huge puncher) smashed him clean with a massive right hand but it had little effect. However, Parker has not faced the biggest punchers so there is still something to be determined obviously.

IMHO the plain fact is that if a monster like Joshua hits you cleanly enough, you'll go down even if your chin is certified A-grade (unless you are a freak like McCall or Vitali perhaps).

 

That's good news because I've put money on the fight going the distance.

Hmm, I think if you've got a solid chin you can take AJ's 1 punch power fine. It's his accumulation that becomes dangerous. Or of course, the legendary British Stoppage