Or is Randall Bailey?

I'm not so sure Matthysse hits harder than Bailey does with that right hand.

Yes, Lucas punches with great power with BOTH hands and is a better overall fighter by far. Cuts off the ring, feints, combos, defense, etc.

But, I'd like to see them both hit the PSI machine, because Bailey with that one right hand may still be the hardest one punch man in all of boxing.
His power is inhuman with that single punch.